Fixes #8098. Use the fast document.head when available. Don't set unneeded...

Fixes #8098. Use the fast document.head when available. Don't set unneeded "script.type = text/javascript".

speed/jquery-basis.js

@@ -524,11 +524,9 @@ jQuery.extend({
 		if ( data && rnotwhite.test(data) ) {
 			// Inspired by code by Andrea Giammarchi
 			// http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
-			var head = document.getElementsByTagName("head")[0] || document.documentElement,
+			var head = document.head || document.getElementsByTagName("head")[0] || document.documentElement,
 				script = document.createElement("script");
 
-			script.type = "text/javascript";
-
 			if ( jQuery.support.scriptEval ) {
 				script.appendChild( document.createTextNode( data ) );
 			} else {
@@ -5060,7 +5058,7 @@ jQuery.extend({
 		// If we're requesting a remote document
 		// and trying to load JSON or Script with a GET
 		if ( s.dataType === "script" && type === "GET" && remote ) {
-			var head = document.getElementsByTagName("head")[0] || document.documentElement;
+			var head = document.head || document.getElementsByTagName( "head" )[0] || document.documentElement;
 			var script = document.createElement("script");
 			script.src = s.url;
 			if ( s.scriptCharset ) {

src/ajax/script.js

@@ -34,7 +34,7 @@ jQuery.ajaxTransport( "script", function(s) {
 	if ( s.crossDomain ) {
 
 		var script,
-			head = document.getElementsByTagName( "head" )[ 0 ] || document.documentElement;
+			head = document.head || document.getElementsByTagName( "head" )[0] || document.documentElement;
 
 		return {
 

src/core.js

@@ -574,10 +574,8 @@ jQuery.extend({
 		if ( data && rnotwhite.test(data) ) {
 			// Inspired by code by Andrea Giammarchi
 			// http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
-			var head = document.getElementsByTagName("head")[0] || document.documentElement,
-				script = document.createElement("script");
-
-			script.type = "text/javascript";
+			var head = document.head || document.getElementsByTagName( "head" )[0] || document.documentElement,
+				script = document.createElement( "script" );
 
 			if ( jQuery.support.scriptEval() ) {
 				script.appendChild( document.createTextNode( data ) );

src/manipulation.js

@@ -7,7 +7,7 @@ var rinlinejQuery = / jQuery\d+="(?:\d+|null)"/g,
 	rtbody = /<tbody/i,
 	rhtml = /<|&#?\w+;/,
 	rnocache = /<(?:script|object|embed|option|style)/i,
-	// checked="checked" or checked (html5)
+	// checked="checked" or checked
 	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
 	wrapMap = {
 		option: [ 1, "<select multiple='multiple'>", "</select>" ],