1771   global.Element = function(tagName, attributes) {  argument
1773     tagName = tagName.toLowerCase();
1776       tagName = '<' + tagName + ' name="' + attributes.name + '">';
1778       return Element.writeAttribute(document.createElement(tagName), attributes);
1780     if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
1781     return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
1872       var tagName = element.tagName.toUpperCase();
1874       if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {
1880         if (tagName in Element._insertionTranslations.tags) {
1884           Element._getContentFromAnonymousElement(tagName, content.stripScripts())
1925     var content, insert, tagName, childNodes;
1940       tagName = ((position == 'before' || position == 'after')
1941         ? element.parentNode : element).tagName.toUpperCase();
1943       childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
1968     var result = '<' + element.tagName.toLowerCase();
2313         if (element.tagName.toUpperCase() == 'BODY') break;
2395 …  if (!Prototype.Browser.Opera || (element.tagName && (element.tagName.toUpperCase() == 'BODY'))) {
2724           if (node.tagName !== "!") // Filter out comment nodes.
2756       if(element.tagName.toUpperCase() == 'IMG' && element.width) {
2793     var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
2795     if (Element._insertionTranslations.tags[tagName]) {
2797       var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
2818 Element._getContentFromAnonymousElement = function(tagName, html) {  argument
2819   var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
2884   function checkDeficiency(tagName) {  argument
2889         var el = document.createElement(tagName);
2914           var t = element.tagName;
2934         tagName = element.tagName.toUpperCase();
2936     if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
2976     var tagName = methods;
2980   if (!tagName) Object.extend(Element.Methods, methods || { });
2982     if (Object.isArray(tagName)) tagName.each(extend);
2983     else extend(tagName);
2986   function extend(tagName) {  argument
2987     tagName = tagName.toUpperCase();
2988     if (!Element.Methods.ByTag[tagName])
2989       Element.Methods.ByTag[tagName] = { };
2990     Object.extend(Element.Methods.ByTag[tagName], methods);
3003   function findDOMClass(tagName) {  argument
3016     if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
3018     klass = 'HTML' + tagName + 'Element';
3020     klass = 'HTML' + tagName.capitalize() + 'Element';
3023     var element = document.createElement(tagName);
3375     tagName:      function(m) {
3474     tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
3507     tagName: function(element, matches) {
3508       return matches[1].toUpperCase() == element.tagName.toUpperCase();
3604           if (child.nodeType == 1 && child.tagName != '!') results.push(child);
3636     tagName: function(nodes, root, tagName, combinator) {  argument
3637       var uTagName = tagName.toUpperCase();
3643               h.concat(results, node.getElementsByTagName(tagName));
3646           if (tagName == "*") return nodes;
3649           if (node.tagName.toUpperCase() === uTagName) results.push(node);
3651       } else return root.getElementsByTagName(tagName);
3821         if (node.tagName == '!' || node.firstChild) continue;
3907         if (node.tagName !== "!") a.push(node);
3962       if (serializers[child.tagName.toLowerCase()])
4005       return /^(?:input|select|textarea)$/i.test(element.tagName);
4066     var method = element.tagName.toLowerCase();
4072     var method = element.tagName.toLowerCase();
4090       if (element.select && (element.tagName.toLowerCase() != 'input' ||
4220     if (this.element.tagName.toLowerCase() == 'form')
4321     if (currentTarget && currentTarget.tagName) {
4323         (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'