<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
#div1{height:300px;width:300px;background: green;}
</style>
</head>
<body>
<input type="button" value="按钮" id="btn">
<div id="div1"></div>
<script>
function getStyle(obj,attr,value){
if(!value){
if(obj.currentStyle){
return obj.currentStyle(attr);
}else{
return getComputedStyle(obj,false)[attr];
}
}else{
obj.style[attr]=value;
}
}
window.onload=function(){
var oDiv=document.getElementById("div1");
var oBtn=document.getElementById("btn");
oBtn.onclick=function(){
console.log(getStyle(oDiv,"width"));
console.log(getStyle(oDiv,"border","1px solid black"));
}
}
</script>
</body>
</html>
