User:Mabuhelwa/modern.js

/* Constants */ // Append a number at the end of these URLs to ensure that, if changes to the fragment have // been made, a reload is forced. This is important if this is used in a // heavily cached environment (say, Wikipedia). // Location of the HTML fragment containing the form code for ImageMapEdit. var IME_HTMLFILE = wgScriptPath + '/index.php?title=User:Dapete/ImageMapEdit.js/template.html.js&action=raw&1'; // Location of the XML file containing translations var IME_TRANSLATEFILE = wgScriptPath + '/index.php?title=User:Dapete/ImageMapEdit.js/translations.xml.js&action=raw&1'; // Scripts to create the circle and polygon images var IME_CIRCLESCRIPT = 'http://toolserver.org/~dapete/ImageMapEdit/circle.php'; var IME_POLYSCRIPT = 'http://toolserver.org/~dapete/ImageMapEdit/poly.php'; // Error messages that cannot be localized in XML var IME_ERROR_IMAGENOTFOUND = 'ImageMapEdit: Could not find image in page structure.'; var IME_ERROR_XMLHTTPREQUEST = 'ImageMapEdit: Browser does not support XMLHttpRequest.'; var IME_ERROR_LOADURL = 'ImageMapEdit: Could not load URL:'; /*   Copyright (c) 2007-2009 Peter Schlömer Released under the following licenses (to make reuse in other Wikis   easier): GNU General Public License (GPL), version 2 GNU Free Documentatin Licence (GFDL), version 1.2 or later Creative Commons Attribution ShareAlike (CC-by-sa), version 2 or later /*   Global variables var ime_areas = Array; var ime_currentlyEditing = -1; var ime_width; var ime_height; var ime_scale; /*   Start Inizialization if this is an image page and there actually is an image // Add hook addOnloadHook(ime_onload); function ime_onload { // Determine whether we are on an image page. Namespace must be 6 and action view if (wgNamespaceNumber==6 && wgAction=='view') { // If we can a div with id file, we initialize if (document.getElementById('file')) { ime_init1; }   } } /*    Create a XMLHttpRequest object, trying differnet methods. Returns false if no XMLHttpRequest implementation could be found. function ime_xmlHttpRequest { if (window.XMLHttpRequest) { return new XMLHttpRequest; }   if (window.ActiveXObject) { try { return new ActiveXObject('Microsoft.XMLHTTP'); }       catch (e) { try { return new ActiveXObject('Msxml2.XMLHTTP'); }           catch (e) { // Do nothing }       }    }    if (window.createRequest) { return window.createRequest; }   return false; } /*   Parses the XML in a string, trying different methods. Returns false if   anything doesn't work, otherwise returns an XML document object. This is necessary because XML data returned from wiki pages in MediaWiki is not parsed as XML correctly, probably because of Content-type problems. In contrast, XML returned by the API works perfectly... function ime_xmlParseString(xmlString) { if (document.implementation && document.implementation.createDocument) { var parser = new DOMParser; return parser.parseFromString(xmlString,'text/xml'); }   if (window.ActiveXObject) { try { var xmlDoc = new ActiveXObject('Microsoft.XMLDOM'); xmlDoc.async = 'false'; xmlDoc.loadXML(xmlString); return xmlDoc; }       catch (e) { // Do nothing }   }    return false; } /*   Create a new div element object with an id. function ime_htmlNewDiv(id) { var div = document.createElement('div'); if (id) div.id = id; return div; } /*   Initialization, part 1: Tries to find image and uses a XMLHttpRequest to download information about the image. When this is done (it's an   asynchronous request) show a link to load the rest of ImageMapEdit using ime_init2. function ime_init1 { var divFile = document.getElementById('file'); if (!divFile) { ime_error(IME_ERROR_IMAGENOTFOUND + ' (ime_init1,divFile=null)'); return; }   var a = ime_findATag(divFile); if (!a) { ime_error(IME_ERROR_IMAGENOTFOUND + ' (ime_init1,a=null)'); return; }   var img = a.firstChild; if (!img) { ime_error(IME_ERROR_IMAGENOTFOUND + ' (ime_init1,img=null)'); return; }   // Now try to use API to get real image parameters var request = ime_xmlHttpRequest; // First time we tried to get a xmlHttpRequest, so if it fails here, it's   // not supported at all if (!request) { ime_error(IME_ERROR_XMLHTTPREQUEST); return; }   var url = wgScriptPath + '/api.php?format=xml&action=query&prop=imageinfo&iiprop=size&titles=' + wgPageName; request.open('GET', url, true); request.send(null); request.onreadystatechange = function { if (request.readyState == 4) { if (request.status == 200) { // Get image data var response = request.responseXML.documentElement; var iiAttr = response.getElementsByTagName('ii')[0].attributes; ime_width = iiAttr.getNamedItem('width').nodeValue; ime_height = iiAttr.getNamedItem('height').nodeValue; ime_scale = img.width/ime_width; // Show 'show ImageMapEdit' button now var a = document.createElement('a'); a.id = 'imeLink'; a.href = 'javascript:ime_init2'; a.style.display = 'block'; a.appendChild(document.createTextNode('ImageMapEdit >')); document.getElementById('file').appendChild(a); return; }           else { ime_error (IME_ERROR_LOADURL + ' ' + url + ' (ime_init1,request.status=' + request.status + ').'); }       }    } } /*    Initialization, part 2: Triggered by an external link. Does some moving around of the image in the logical structure of the page, then hides the link and finally loads some more HTML code and translation information from external files (IME_HTMLFILE and IME_TRANSLATEFILE) using an   asynchronous XMLHttpRequest. function ime_init2 { // Remove UI that might interfere with this code ime_removeOtherUIElements; var divFile = document.getElementById('file'); var tempNode = divFile.firstChild; var a = ime_findATag(tempNode); var img = a.firstChild; var divImeContainer = ime_htmlNewDiv('imeContainer'); divImeContainer.style.position = 'relative'; // Move image from within link to outside a.removeChild(img); divFile.insertBefore(divImeContainer,tempNode); divFile.removeChild(tempNode); img.id = 'imeImg'; img.style.zIndex = 99; img.style.border = 'none'; img.style.opacity = '0.75'; img.style.filter = 'alpha(opacity=75)'; // IE   // Internet Explorer needs this differently if (typeof(navigator.userAgent) != 'undefined' && navigator.userAgent.match('/MSIE/')) { divImeContainer.style.overflow = 'none'; }   else { divImeContainer.style.overflow = 'auto'; }   var divImePreview = ime_htmlNewDiv('imePreview'); divImePreview.style.position = 'absolute'; divImePreview.style.top = '0'; divImePreview.style.left = '0'; divImePreview.style.width = img.width + 'px'; divImePreview.style.height = img.height + 'px'; divImePreview.zIndex = 0; divImeContainer.appendChild(divImePreview); divImeContainer.appendChild(img); var divIme = ime_htmlNewDiv('ime'); divFile.appendChild(divIme); // Hide the link now document.getElementById('imeLink').style.display = 'none'; // Disable image context menu so right click can be used for events img.oncontextmenu = ime_eventDummy; // Load form data with HTTP var request = ime_xmlHttpRequest; if (!request) { ime_error (IME_ERROR_LOADURL + ' ' + url + ' (ime_init2,request=null)'); return; }   request.open('GET', IME_HTMLFILE, true); request.onreadystatechange = function { if (request.readyState == 4) { if (request.status == 200) { divIme.innerHTML = request.responseText; // Another request for the XML file containing translations var request2 = ime_xmlHttpRequest; if (!request) { ime_error (IME_ERROR_LOADURL + ' ' + url + ' (ime_init2,request2=null)'); return; }               request2.open('GET', IME_TRANSLATEFILE, true); request2.onreadystatechange = function { if (request2.readyState == 4) { if (request2.status == 200) { var response; if (request2.responseXML) { response = request2.responseXML.documentElement; }                           else { // Stupid workaround of responseXML is empty - // just parse the responseText again response = ime_xmlParseString(request2.responseText).documentElement; }                           var languages = response.getElementsByTagName('language'); // Use translation for the currently set language (MediaWiki supplies this in wgUserLanguage) ime_translate(wgUserLanguage, languages); }                       else { ime_error (IME_ERROR_LOADURL + ' ' + IME_TRANSLATEFILE + ' (ime_init2,request2.status=' + request2.status + ').'); }                   }                }                request2.send(null); }           else { ime_error (IME_ERROR_LOADURL + ' ' + IME_HTMLFILE + ' (ime_init2,request.status=' + request.status + ').'); }       }    }    request.send(null); } /*   Translate the user interface to the specified language. function ime_translate(languageCode, languages) { var language = false; // Try to find language information for (var i=0; i<languages.length; i++) { if (languages[i].attributes.getNamedItem('name').nodeValue == languageCode) { language = languages[i]; break; }   }    // If a language has been found ... if (language) { // ... see if we need to inherit another language if (language.attributes.getNamedItem('inherit')) { // If we do, we call ourselves recursively to translate to that language first ime_translate(language.attributes.getNamedItem('inherit').nodeValue, languages); }       // ... get all the translations and replace the text in the HTML var translations = language.getElementsByTagName('translation'); for (var i=0; i 0) { var text = translation.firstChild.nodeValue; for (var j=0; j<elements.length; j++) { elements[j].innerHTML = text; }           }        }    } } /*    Finds all elements in the current document with the specified class. function ime_getElementsByClassName(className) { // Hopefully the browser supports this natively if (document.getElementsByClassName) { return document.getElementsByClassName(className); }   // Otherwise use the function defined by MediaWiki return getElementsByClassName(document,'*',className) } /*   Display an error message, either by putting it on the page or - if the place to put it does not exist - by showing an alert box. function ime_error(message) { var divFile = document.getElementById('file'); if (divFile) { var pImeError = document.createElement('p'); pImeError.style.color = 'darkred'; pImeError.style.background = 'white'; pImeError.style.border = '1px solid darkred'; pImeError.style.padding = '1ex'; pImeError.appendChild(document.createTextNode(message)); var divIme = document.getElementById('ime'); if (divIme) { divIme.insertBefore(pImeError,divIme.firstChild); }       else { divFile.appendChild(pImeError); }   }    else { window.alert(message); } } /*   Dummy function to intercept events function ime_eventDummy(e) { e.cancelBubble = true; return false; } /*   Function to define an object containing rect(angle) coordinates. function ime_RectCoord(x1,y1,x2,y2) { this.left = x1; this.top = y1; this.right = x2; this.bottom = y2; } /*   Function to define an object containing circle coordinates. function ime_CircleCoord(x,y,r) { this.x = x;   this.y = y;    this.radius = r; } /*   Function to define an object containing poly(gon) coordinates. function ime_PolyCoord(x,y,r) { this.points = Array; } /*   Function to define an object storing info on a clickable area for the imagemap. function ime_Area(shape) { if (shape=='rect') { this.shape = 'rect'; this.coords = new ime_RectCoord(0,0,0,0); }   else if (shape=='circle') { this.shape = 'circle'; this.coords = new ime_CircleCoord(0,0,20); }   else { this.shape = 'poly'; this.coords = new ime_PolyCoord; }   this.link = ''; this.title = ''; } /*   Browser invariant function to get the event "behind" the object passed to event handlers. function ime_getEvent(e) { if (e) { return e;   } else { return window.event; } } function ime_eventGetX(e) { if (typeof(e.layerX)!='undefined') { return Math.round(e.layerX / ime_scale); }   if (typeof(e.offsetX)!='undefined') { return Math.round(e.offsetX / ime_scale); }   else { return Math.round(e.x / ime_scale); } } function ime_eventGetY(e) { if (typeof(e.layerY)!='undefined') { return Math.round(e.layerY / ime_scale); }   if (typeof(e.offsetY)!='undefined') { return Math.round(e.offsetY / ime_scale); }   else { return Math.round(e.y / ime_scale); } } function ime_eventGetButton(e) { if (typeof(e.which)!='undefined') { return e.which; }   else { return e.button; } } function ime_mouseEventClear { var img = document.getElementById('imeImg'); img.onmousedown = null; img.style.cursor = ''; } function ime_mouseEventSet(func) { var img = document.getElementById('imeImg'); img.onmousedown = func; img.style.cursor = 'crosshair'; } function ime_eventRect(e) { e = ime_getEvent(e); var button = ime_eventGetButton(e); if (button==1) { document.ime.areaRectLeft.value = ime_eventGetX(e); document.ime.areaRectTop.value = ime_eventGetY(e); }   else if (button==2 || button==3) { document.ime.areaRectRight.value = ime_eventGetX(e); document.ime.areaRectBottom.value = ime_eventGetY(e); }   ime_saveArea; return false; } function ime_eventCircle(e) { e = ime_getEvent(e); var button = ime_eventGetButton(e); if (button==1) { document.ime.areaCircleX.value = ime_eventGetX(e); document.ime.areaCircleY.value = ime_eventGetY(e); }   else if (button==2 || button==3) { var a = (ime_eventGetX(e) - parseInt(document.ime.areaCircleX.value)); var b = (ime_eventGetY(e) - parseInt(document.ime.areaCircleY.value)); document.ime.areaCircleRadius.value = Math.round(Math.sqrt(a*a + b*b)); }   ime_saveArea; return false; } function ime_eventPoly(e) { e = ime_getEvent(e); var button = ime_eventGetButton(e); if (button==1) { area = ime_areas[ime_currentlyEditing]; area.coords.points.push(ime_eventGetX(e)); area.coords.points.push(ime_eventGetY(e)); ime_saveArea; }   return false; } function ime_newArea(shape) { var area = new ime_Area(shape); area.shape = shape; ime_areas.push(area); ime_currentlyEditing = ime_areas.length-1; ime_updateAreas; ime_editArea(ime_currentlyEditing); } function ime_updateAreas { ime_updateSelectArea; ime_updateMap; ime_updateResult; } function ime_updateResult { var arr = document.ime.imageDescriptionPos; var imageDescriptionPos = arr[0].value; for (var i=1; i<arr.length; i++) { if (arr[i].checked) { imageDescriptionPos = arr[i].value; break; }   }    var result = Array; result.push(' '); var preResult = document.getElementById('imeResult'); while (preResult.lastChild) { preResult.removeChild(preResult.lastChild); }   for (var i=0; i=ime_areas.length) { preview.removeChild(child); i--; }   }    for (var i=0; i<ime_areas.length; i++) { // Get existing DIV var area = ime_areas[i]; var div = document.getElementById('imePreview' + i); // If it does not exist exists, create a new one and set style if (!div) { var div = ime_htmlNewDiv('imePreview' + i)           preview.appendChild(div); div.style.zIndex = 0; div.style.position = 'absolute'; div.style.opacity = 0.5; div.style.filter = 'alpha(opacity=50)'; }       var coords = area.coords; if (area.shape == 'rect') { div.className = 'previewRect'; // Only if valid coordinates were given, draw if (coords.left<coords.right && coords.top<coords.bottom) { div.style.left = Math.round(ime_scale * coords.left) + 'px'; div.style.top = Math.round(ime_scale * coords.top) + 'px'; div.style.width = (Math.round(ime_scale * coords.right) - Math.round(ime_scale * coords.left)) + 'px'; div.style.height = (Math.round(ime_scale * coords.bottom) - Math.round(ime_scale * coords.top)) + 'px'; }           else { div.style.left = '0'; div.style.top = '0'; div.style.width = '0'; div.style.height = '0'; }       }        else if (area.shape == 'circle') { div.className = 'previewCircle'; div.style.backgroundRepeat = 'no-repeat'; var left = Math.round(ime_scale * coords.x) - Math.round(ime_scale * coords.radius); var top = Math.round(ime_scale * coords.y) - Math.round(ime_scale * coords.radius); var size = Math.round(ime_scale * coords.radius * 2) + 1; div.style.left = left + 'px'; div.style.top = top + 'px'; if (left + size > img.width) { div.style.width = (img.width - left) + 'px'; }           else { div.style.width = size + 'px'; }           if (top + size > img.height) { div.style.height = (img.height - top) + 'px'; }           else { div.style.height = size + 'px'; }       }        else if (area.shape == 'poly') { // Determine maximum coordinates (this is how big the image is) div.className = 'previewPoly'; div.style.backgroundRepeat = 'no-repeat'; var points = coords.points; var minX=0; var maxX=0; var minY=0; var maxY=0; if (points.length>0) { minX = points[0]; maxX = points[0]; minY = points[1]; maxY = points[1]; for (var j=2; jmaxX) maxX = x;                    if (ymaxY) maxY = y;                } }           div.style.left = Math.round(ime_scale * minX) + 'px'; div.style.top = Math.round(ime_scale * minY) + 'px'; div.style.width = (Math.round(ime_scale * maxX) - Math.round(ime_scale * minX)) + 'px'; div.style.height = (Math.round(ime_scale * maxY) - Math.round(ime_scale * minY)) + 'px'; }   }    ime_highlightMap; } function ime_highlightMapCircle(div,radius,highlight) { var background = "url('" + IME_CIRCLESCRIPT + '?' + (highlight ? 'active=1&' : '') + 'radius=' + Math.round(ime_scale * radius) + "') no-repeat"; if (div.style.background != background) { div.style.background = background; } } function ime_highlightMapPoly(div,points,highlight) { var minX=0; var minY=0; if (points.length>0) { minX = points[0]; minY = points[1]; for (var j=2; j<points.length; j+=2) { var x = points[j]; var y = points[j+1]; if (x<minX) minX = x;           if (y<minY) minY = y;        } }   var convpoints = Array; for(var j=0; j<points.length; j+=2) { convpoints[j] = Math.round(ime_scale * points[j]) - Math.round(ime_scale * minX); convpoints[j+1] = Math.round(ime_scale * points[j+1]) - Math.round(ime_scale * minY); }   var background = "url('" + IME_POLYSCRIPT + '?' + (highlight ? 'active=1&' : '') + 'coords=' + convpoints.join("|") + "') no-repeat"; if (div.style.background != background) { div.style.background = background; } } function ime_highlightMap { for (var i=0; i<ime_areas.length; i++) { var div = document.getElementById('imePreview' + i); var area = ime_areas[i]; if (div && area) { if (area.shape == 'rect') { var backgroundColor = (i==ime_currentlyEditing) ? 'red' : 'black'; if (div.style.backgroundColor != backgroundColor) div.style.backgroundColor = backgroundColor; }           else if (area.shape == 'circle') { ime_highlightMapCircle(div,area.coords.radius,(i==ime_currentlyEditing)); }           else if (area.shape == 'poly') { ime_highlightMapPoly(div,area.coords.points,(i==ime_currentlyEditing)); }       }    } } function ime_updateSelectArea { var selectArea = document.ime.area; while (selectArea.childNodes.length>0) { selectArea.removeChild(selectArea.lastChild); }   for (var i=0; i0) { option.removeChild(option.lastChild); }       var text = (area.title ? area.title : area.link) + ' [' + area.shape + ']'; option.appendChild(document.createTextNode(text)); if (i == ime_currentlyEditing) { option.selected = 'selected'; }       selectArea.appendChild(option); } } function ime_editArea(index) { document.getElementById('imeProps').style.display = 'none'; var area = ime_areas[index]; if (area) { ime_currentlyEditing = index; document.getElementById('imeProps').style.display = ''; document.getElementById('imePropsRect').style.display = 'none'; document.getElementById('imePropsCircle').style.display = 'none'; document.getElementById('imePropsPoly').style.display= 'none'; ime_mouseEventClear; if (area.shape == 'rect') { document.getElementById('imePropsRect').style.display = ''; ime_mouseEventSet(ime_eventRect); }       else if (area.shape == 'circle') { document.getElementById('imePropsCircle').style.display = ''; ime_mouseEventSet(ime_eventCircle); }       else if (area.shape == 'poly') { document.getElementById('imePropsPoly').style.display = ''; ime_mouseEventSet(ime_eventPoly); }       document.ime.areaLink.value = area.link; document.ime.areaTitle.value = area.title; var coords = area.coords; if (area.shape == 'rect') { document.ime.areaRectLeft.value = coords.left; document.ime.areaRectTop.value = coords.top; document.ime.areaRectRight.value = coords.right; document.ime.areaRectBottom.value = coords.bottom; }       else if (area.shape == 'circle') { document.ime.areaCircleX.value = coords.x;           document.ime.areaCircleY.value = coords.y;            document.ime.areaCircleRadius.value = coords.radius; }       else if (area.shape == 'poly') { var propsPolyCoords = document.getElementById('imePropsPolyCoords'); if (propsPolyCoords.childNodes.length > 0) propsPolyCoords.removeChild(propsPolyCoords.lastChild); propsPolyCoords.appendChild(document.createTextNode(area.coords.points.join(", "))); }       ime_highlightMap; } } function ime_deletePolyCoords { ime_areas[ime_currentlyEditing].coords.points = Array; ime_saveArea; } function ime_saveArea { var area = ime_areas[ime_currentlyEditing]; area.link = document.ime.areaLink.value; area.title = document.ime.areaTitle.value; var coords = area.coords; if (area.shape=='rect') { coords.left = parseInt(document.ime.areaRectLeft.value); coords.top = parseInt(document.ime.areaRectTop.value); coords.right = parseInt(document.ime.areaRectRight.value); coords.bottom = parseInt(document.ime.areaRectBottom.value); }   else if (area.shape=='circle') { if (parseInt(document.ime.areaCircleRadius.value) < 0) document.ime.areaCircleRadius.value = 0; coords.x = parseInt(document.ime.areaCircleX.value); coords.y = parseInt(document.ime.areaCircleY.value); coords.radius = parseInt(document.ime.areaCircleRadius.value); }   else if (area.shape == 'poly') { var propsPolyCoords = document.getElementById('imePropsPolyCoords'); if (propsPolyCoords.childNodes.length > 0) propsPolyCoords.removeChild(propsPolyCoords.lastChild); propsPolyCoords.appendChild(document.createTextNode(coords.points.join(", "))); }   ime_updateAreas; } function ime_deleteArea { ime_mouseEventClear; // Remove element from ime_areas array ime_areas.splice(ime_currentlyEditing,1); // Remove preview div of the deleted area var div = document.getElementById('imePreview' + ime_currentlyEditing); if (div) { div.parentNode.removeChild(div); }   // Move ids of preview divs to fill the hole for (var i=ime_currentlyEditing+1; i=ime_areas.length) { ime_currentlyEditing = ime_areas.length-1; }   ime_updateAreas; ime_editArea(ime_currentlyEditing); } function ime_importLines { var text = document.ime.importText.value; var lines = text.split("\n"); for (var i=0; i<lines.length; i++) { var rectMatch = /rect +(\d+) +(\d+) +(\d+) +(\d+) +\[\[([^|]*)(|(.*))?\]\]/i; var circleMatch = /circle +(\d+) +(\d+) +(\d+) +\[\[([^|]*)(|(.*))?\]\]/i; var polyMatch = /poly +(.*?) +\[\[([^|]*)(|(.*))?\]\]/i; var line = lines[i]; if (rectMatch.test(line)) { var results = rectMatch.exec(line); var area = new ime_Area("rect"); area.coords.left = parseInt(results[1]); area.coords.top = parseInt(results[2]); area.coords.right = parseInt(results[3]); area.coords.bottom = parseInt(results[4]); area.link = results[5]; if (results[6]) area.title = results[6].substring(1); ime_areas.push(area); }       else if (circleMatch.test(line)) { var results = circleMatch.exec(line); var area = new ime_Area("circle"); area.coords.x = parseInt(results[1]); area.coords.y = parseInt(results[2]); area.coords.radius = parseInt(results[3]); area.link = results[4]; if (results[5]) area.title = results[5].substring(1); ime_areas.push(area); }       else if (polyMatch.test(line)) { var results = polyMatch.exec(line); var area = new ime_Area("poly"); area.coords.points = results[1].replace(/ +/," ").split(" "); for (var j=0; j<area.coords.points.length; j++) { area.coords.points[j] = parseInt(area.coords.points[j]); }           area.link = results[2]; if (results[3]) area.title = results[3].substring(1); ime_areas.push(area); }   }    ime_updateAreas; ime_hideImport; } function ime_showImport { document.getElementById('imeImport').style.display = ''; document.getElementById('imeImportShow').style.display = 'none'; document.getElementById('imeImportHide').style.display = ''; } function ime_hideImport { document.getElementById('imeImport').style.display = 'none'; document.getElementById('imeImportShow').style.display = ''; document.getElementById('imeImportHide').style.display = 'none'; } /*   Remove all UI elements that might interfere with ImageMapEdit. function ime_removeOtherUIElements { // Remove all UI elements of the 'annotations' feature used on Wikimedia // Commons. var addButton = document.getElementById('ImageAnnotationAddButton'); if (addButton) { var whatToDelete = addButton.parentNode.parentNode; var whereToDelete = whatToDelete.parentNode; whereToDelete.removeChild(whatToDelete); } } /*   Try to find an  tag within the specified HTML document node. function ime_findATag(node) { // We just look at the first child until there is none or it is an  tag var a = node; while (a != null && a.nodeName.toUpperCase != 'A') { a = a.firstChild; }   return a; }