IE浏览器支持getElementsByClassName方法

document.getElementsByClassName = function(){
var tTagName ="*";
if(arguments.length > 1){
tTagName = arguments[1];
}
if(arguments.length > 2){
var pObj = arguments[2]
}
else{
var pObj = document;
}
var objArr = pObj.getElementsByTagName(tTagName);
var tRObj = new Array();
for(var i=0; i if(objArr[i].className == arguments[0]){
tRObj.push(objArr[i]);
}
}
return tRObj;
}

 

测试涵数

function test(){
var obj=document.getElementsByClassName(”qq”);
for (var i=0;i obj[i].style.color=”#ff0000″;
}
}

 

 

 

自己的测试