Added in jQuery.nodeName() to simplify checking nodeName constantly.

src/jquery/jquery.js

@@ -1100,7 +1100,7 @@ jQuery.fn = jQuery.prototype = {
 		return this.each(function(){
 			var obj = this;
 
-			if ( table && this.nodeName.toUpperCase() == "TABLE" && a[0].nodeName.toUpperCase() == "TR" )
+			if ( table && jQuery.nodeName(this, "table") && jQuery.nodeName(a[0], "tr") )
 				obj = this.getElementsByTagName("tbody")[0] || this.appendChild(document.createElement("tbody"));
 
 			jQuery.each( a, function(){
@@ -1229,6 +1229,10 @@ jQuery.extend({
 			typeof fn[0] == "undefined" && /function/i.test( fn + "" );
 	},
 
+	nodeName: function( elem, name ) {
+		return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
+	},
+
 	/**
 	 * A generic iterator function, which can be used to seemlessly
 	 * iterate over both objects and arrays. This function is not the same
@@ -1451,7 +1455,7 @@ jQuery.extend({
 						tb = div.childNodes;
 
 					for ( var n = tb.length-1; n >= 0 ; --n )
-						if ( tb[n].nodeName.toUpperCase() == "TBODY" && !tb[n].childNodes.length )
+						if ( jQuery.nodeName(tb[n], "tbody") && !tb[n].childNodes.length )
 							tb[n].parentNode.removeChild(tb[n]);
 					
 				}
@@ -1510,7 +1514,7 @@ jQuery.extend({
 			if ( value != undefined ) elem[fix[name]] = value;
 			return elem[fix[name]];
 
-		} else if ( value == undefined && jQuery.browser.msie && elem.nodeName && elem.nodeName.toUpperCase() == "FORM" && (name == "action" || name == "method") )
+		} else if ( value == undefined && jQuery.browser.msie && jQuery.nodeName(elem, "form") && (name == "action" || name == "method") )
 			return elem.getAttributeNode(name).nodeValue;
 
 		// IE elem.getAttribute passes even for style

src/selector/selector.js

 jQuery.extend({
 	expr: {
-		"": "m[2]=='*'||a.nodeName.toUpperCase()==m[2].toUpperCase()",
+		"": "m[2]=='*'||jQuery.nodeName(a,m[2])",
 		"#": "a.getAttribute('id')==m[2]",
 		":": {
 			// Position Checks
@@ -45,7 +45,7 @@ jQuery.extend({
 			submit: "a.type=='submit'",
 			image: "a.type=='image'",
 			reset: "a.type=='reset'",
-			button: 'a.type=="button"||a.nodeName.toUpperCase()=="BUTTON"',
+			button: 'a.type=="button"||jQuery.nodeName(a,"button")',
 			input: "/input|select|textarea|button/i.test(a.nodeName)"
 		},
 		".": "jQuery.className.has(a,m[2])",
@@ -155,7 +155,7 @@ jQuery.extend({
 				// Perform our own iteration and filter
 				jQuery.each( ret, function(){
 					for ( var c = this.firstChild; c; c = c.nextSibling )
-						if ( c.nodeType == 1 && ( c.nodeName.toUpperCase() == m[1].toUpperCase() || m[1] == "*" ) )
+						if ( c.nodeType == 1 && ( jQuery.nodeName(c, m[1]) || m[1] == "*" ) )
 							r.push( c );
 				});
 
@@ -227,7 +227,7 @@ jQuery.extend({
 						// Do a quick check for node name (where applicable) so
 						// that div#foo searches will be really fast
 						ret = r = oid && 
-						  (!m[3] || oid.nodeName.toUpperCase() == m[3].toUpperCase()) ? [oid] : [];
+						  (!m[3] || jQuery.nodeName(oid, m[3])) ? [oid] : [];
 
 					} else {
 						// Pre-compile a regular expression to handle class searches
@@ -242,7 +242,7 @@ jQuery.extend({
 							var tag = m[1] != "" || m[0] == "" ? "*" : m[2];
 
 							// Handle IE7 being really dumb about <object>s
-							if ( this.nodeName.toUpperCase() == "OBJECT" && tag == "*" )
+							if ( jQuery.nodeName(this, "object") && tag == "*" )
 								tag = "param";
 
 							jQuery.merge( r,