教你用javascript实现随机标签云效果_附代码

window.onload=function(){
 var obox=document.getElementById("wrap");
 var obj=obox.getElementsByTagName("a");
 //随机方法
 function rand(num){
  return parseInt(Math.random()*num+1);
 }
 //随机颜色值
 function randomcolor(){
  var str=Math.ceil(Math.random()*16777215).toString(16);
  if(str.length<6){
   str="0"+str;
  }
  return str;
 }
 //循环
 for( len=obj.length,i=len;i--;){
  obj[i].className="color"+rand(5);
  obj[i].style.zIndex=rand(5);
  obj[i].style.fontSize=rand(12)+12+"px";
  // obj[i].style.background="#"+randomcolor();
  obj[i].style.color="#"+randomcolor();
  obj[i].onmouseover=function(){
   this.style.background="#"+randomcolor();
  }
  obj[i].onmouseout=function(){
   this.style.background="none";
  }
 }
}