JavaScript改变HTML元素的样式改变CSS及元素属性

document.getElementById(id).style.property=new style 
<p id="p2">Hello World!</p> 
<script> 
document.getElementById("p2").style.color="blue"; 
</script> 
 
JS改变元素属性; 
 代码如下:

<script> 
var div = document.getElementByIdx_x('d1'); 
div.setAttribute("class", "abc"); 
</script>