1 Sys.UI.DomElement.addCssClass = function Sys$UI$DomElement$addCssClass(element, className) {
5 var e = Function._validateParams(arguments, [
6 {name: "element", domElement: true},
7 {name: "className", type: String}
8 ]);
9 if (e) throw e;
10 if (!Sys.UI.DomElement.containsCssClass(element, className)) {
11 if (element.className === '') {
12 element.className = className;
13 }
14 else {
15 element.className += ' ' + className;
16 }
17 }
18 }