1 <div class="box haha xixi">123</div>
2 <script>
3 function removeClass(element,classNa){
4 var arr=new Array();
5 var classArr=element.className.split(" ");
6 element.className="";
7 for(var i=0;i<classArr.length;i++){
8 if(classArr[i]===classNa){
9 classArr.splice(i,1);
10 }
11 }
12 element.className=classArr.join(" ");
13 }
14 var box=document.getElementsByTagName("div")[0];
15 removeClass(box,"box")
1 var div=document.getElementsByTagName("div")[0];
2 function addClass(element,classNa){
3 div.className+=" "+classNa;
4 }
5 addClass(div,"lala")
