X-Git-Url: http://git.asbjorn.it/?a=blobdiff_plain;f=src%2Fcore.js;h=35cac37b747c73470c7087abb25f1e8833c71004;hb=b7a3b220a8a2b5b0378c9f176ca5ae0f786a6fcf;hp=cb9b528eca4d46b149bc0f947db4bc5acd691cb4;hpb=26eda09892459709d224f910038b8f6836bfd012;p=jquery.git

diff --git a/src/core.js b/src/core.js
index cb9b528..35cac37 100644
--- a/src/core.js
+++ b/src/core.js
@@ -20,7 +20,7 @@ var jQuery = function( selector, context ) {
 
 	// A simple way to check for HTML strings or ID strings
 	// (both of which we optimize for)
-	quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,
+	quickExpr = /^[^<]*(<[\w\W]+>)[^>]*$|^#([\w-]+)$/,
 
 	// Is it a simple selector
 	isSimple = /^.[^:#\[\.,]*$/,
@@ -47,7 +47,9 @@ jQuery.fn = jQuery.prototype = {
 		var match, elem, ret;
 
 		// Handle $(""), $(null), or $(undefined)
-		if ( !selector ) return this;
+		if ( !selector ) {
+			return this;
+		}
 
 		// Handle $(DOMElement)
 		if ( selector.nodeType ) {
@@ -70,12 +72,14 @@ jQuery.fn = jQuery.prototype = {
 
 				// HANDLE: $("#id")
 				} else {
-					elem = document.getElementById( match[3] );
+					elem = document.getElementById( match[2] );
 
 					if ( elem ) {
 						// Handle the case where IE and Opera return items
 						// by name instead of ID
-						if ( elem.id !== match[3] ) return rootjQuery.find( selector );
+						if ( elem.id !== match[2] ) {
+							return rootjQuery.find( selector );
+						}
 
 						// Otherwise, we inject the element directly into the jQuery object
 						this.length++;
@@ -313,7 +317,9 @@ jQuery.extend({
 
 	// check if an element is in a (or is an) XML document
 	isXMLDoc: function( elem ) {
-		return (elem.ownerDocument || elem).documentElement.nodeName !== "HTML";
+		// documentElement is verified for cases where it doesn't yet exist
+		// (such as loading iframes in IE - #4833)
+		return ((elem.ownerDocument || elem).documentElement || 0).nodeName !== "HTML";
 	},
 
 	// Evalulates a script in a global context