<style type="text/css">
{
background-color:gray;
}
</style>
<script type="text/javascript">
function hasClass(obj, cls) {
return (new RegExp('(\\s|^)' + cls + '(\\s|$)'));
}
function addClass(obj, cls) {
if (!(obj, cls)) += " " + cls;
}
function removeClass(obj, cls) {
if (hasClass(obj, cls)) {
var reg = new RegExp('(\\s|^)' + cls + '(\\s|$)');
= obj.(reg, ' ');
}
}
function toggleClass(obj,cls){
if(hasClass(obj,cls)){
removeClass(obj, cls);
}else{
addClass(obj, cls);
}
}
function toggleClassTest(){
var obj = document. getElementById('test');
toggleClass(obj,"testClass");
}
</script>
<body>
<div id = "test" style = "width:250px;height:100px;">
sssssssssssss
</div>
<input type = "button" value = "toggleClassTest" onclick = "toggleClassTest();" />
</body>
