X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fsupport.js;h=f502811ae8d8b78d0424caa4c1e1aca24e396540;hb=220a0ce1628d376ec14394c9b0be3c10f92a4cdb;hp=b9c10c7a208fa03a260c5b8e5e886d13fa6a98c9;hpb=e1b940d74824282fd3466d39a8ab574da4ef6fc5;p=jquery.git

diff --git a/src/support.js b/src/support.js
index b9c10c7..f502811 100644
--- a/src/support.js
+++ b/src/support.js
@@ -4,10 +4,7 @@
 
 	jQuery.support = {};
 
-	var root = document.documentElement,
-		script = document.createElement("script"),
-		div = document.createElement("div"),
-		id = "script" + jQuery.now();
+	var div = document.createElement("div");
 
 	div.style.display = "none";
 	div.innerHTML = "   <link/><table></table><a href='/a' style='color:red;float:left;opacity:.55;'>a</a><input type='checkbox'/>";
@@ -64,7 +61,7 @@
 		deleteExpando: true,
 		optDisabled: false,
 		checkClone: false,
-		scriptEval: false,
+		_scriptEval: null,
 		noCloneEvent: true,
 		boxModel: null,
 		inlineBlockNeedsLayout: false,
@@ -77,32 +74,45 @@
 	select.disabled = true;
 	jQuery.support.optDisabled = !opt.disabled;
 
-	script.type = "text/javascript";
-	try {
-		script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
-	} catch(e) {}
-
-	root.insertBefore( script, root.firstChild );
-
-	// Make sure that the execution of code works by injecting a script
-	// tag with appendChild/createTextNode
-	// (IE doesn't support this, fails, and uses .text instead)
-	if ( window[ id ] ) {
-		jQuery.support.scriptEval = true;
-		delete window[ id ];
-	}
+	jQuery.support.scriptEval = function() {
+		if ( jQuery.support._scriptEval === null) {
+			var root = document.documentElement,
+				script = document.createElement("script"),
+				id = "script" + jQuery.now();
+
+			script.type = "text/javascript";
+			try {
+				script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
+			} catch(e) {}
+
+			root.insertBefore( script, root.firstChild );
+
+			// Make sure that the execution of code works by injecting a script
+			// tag with appendChild/createTextNode
+			// (IE doesn't support this, fails, and uses .text instead)
+			if ( window[ id ] ) {
+				jQuery.support._scriptEval = true;
+				delete window[ id ];
+			} else {
+				jQuery.support._scriptEval = false;
+			}
+
+			root.removeChild( script );
+			// release memory in IE
+			root = script = id  = null;
+		}
+		return jQuery.support._scriptEval;
+	};
 
 	// Test to see if it's possible to delete an expando from an element
 	// Fails in Internet Explorer
 	try {
-		delete script.test;
+		delete div.test;
 
 	} catch(e) {
 		jQuery.support.deleteExpando = false;
 	}
 
-	root.removeChild( script );
-
 	if ( div.attachEvent && div.fireEvent ) {
 		div.attachEvent("onclick", function click() {
 			// Cloning a node shouldn't copy over any
@@ -147,7 +157,7 @@
 			jQuery.support.shrinkWrapBlocks = div.offsetWidth !== 2;
 		}
 
-		div.innerHTML = "<table><tr><td style='padding:0;display:none'></td><td>t</td></tr></table>";
+		div.innerHTML = "<table><tr><td style='padding:0;border:0;display:none'></td><td>t</td></tr></table>";
 		var tds = div.getElementsByTagName("td");
 
 		// Check if table cells still have offsetWidth/Height when they are set
@@ -191,20 +201,6 @@
 	jQuery.support.changeBubbles = eventSupported("change");
 
 	// release memory in IE
-	root = script = div = all = a = null;
+	div = all = a = null;
 })();
-
-jQuery.props = {
-	"for": "htmlFor",
-	"class": "className",
-	readonly: "readOnly",
-	maxlength: "maxLength",
-	cellspacing: "cellSpacing",
-	rowspan: "rowSpan",
-	colspan: "colSpan",
-	tabindex: "tabIndex",
-	usemap: "useMap",
-	frameborder: "frameBorder"
-};
-
 })( jQuery );