Oops, forgot to commit support.js.

src/support.js

+(function(){
+
+	jQuery.support = {};
+
+	var root = document.documentElement,
+		script = document.createElement("script"),
+		div = document.createElement("div"),
+		id = "script" + (new Date).getTime();
+
+	div.style.display = "none";
+	div.innerHTML = '   <link/><table></table><a href="/a" style="color:red;float:left;opacity:.5;">a</a><select><option>text</option></select><object><param></object>';
+
+	var all = div.getElementsByTagName("*"),
+		a = div.getElementsByTagName("a")[0];
+
+	// Can't get basic test support
+	if ( !all || !all.length || !a ) {
+		return;
+	}
+
+	jQuery.support = {
+		// IE strips leading whitespace when .innerHTML is used
+		leadingWhitespace: div.firstChild.nodeType == 3,
+		
+		// Make sure that tbody elements aren't automatically inserted
+		// IE will insert them into empty tables
+		tbody: !div.getElementsByTagName("tbody").length,
+		
+		// Make sure that you can get all elements in an <object> element
+		// IE 7 always returns no results
+		objectAll: !!div.getElementsByTagName("object")[0]
+			.getElementsByTagName("*").length,
+		
+		// Make sure that link elements get serialized correctly by innerHTML
+		// This requires a wrapper element in IE
+		htmlSerialize: !!div.getElementsByTagName("link").length,
+		
+		// Get the style information from getAttribute
+		// (IE uses .cssText insted)
+		style: /red/.test( a.getAttribute("style") ),
+		
+		// Make sure that URLs aren't manipulated
+		// (IE normalizes it by default)
+		hrefNormalized: a.getAttribute("href") === "/a",
+		
+		// Make sure that element opacity exists
+		// (IE uses filter instead)
+		opacity: a.style.opacity === "0.5",
+		
+		// Verify style float existence
+		// (IE uses styleFloat instead of cssFloat)
+		cssFloat: !!a.style.cssFloat,
+
+		// Will be defined later
+		scriptEval: false,
+		noCloneEvent: true
+	};
+	
+	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 ];
+	}
+
+	root.removeChild( script );
+
+	if ( div.attachEvent && div.fireEvent ) {
+		div.attachEvent("onclick", function(){
+			// Cloning a node shouldn't copy over any
+			// bound event handlers (IE does this)
+			jQuery.support.noCloneEvent = false;
+		});
+		div.cloneNode(true).fireEvent("onclick");
+	}
+
+})();
+
+var styleFloat = jQuery.support.cssFloat ? "cssFloat" : "styleFloat";
+
+jQuery.props = {
+	"for": "htmlFor",
+	"class": "className",
+	"float": styleFloat,
+	cssFloat: styleFloat,
+	styleFloat: styleFloat,
+	readonly: "readOnly",
+	maxlength: "maxLength",
+	cellspacing: "cellSpacing",
+	rowspan: "rowSpan"
+};
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