// JavaScript Document
 function changeColor(){
	var dls = document.getElementsByTagName('div');
	for(var i=0; i<dls.length; i++){
		var div = dls[i];
		if(div.className=='box1'){
			div.onmouseover=function(){ 
			this.className='box2'
			}
			div.onmouseout = function(){
			this.className='box1'
			}
		}
	}
 }
 window.onload=changeColor;
 
 /*

function changeColor(){
  var test;
  test=document.getElementById("box");

  test.onmouseover=function(){
   test.className='box2';
  }
  test.onmouseout=function(){
   test.className='box1';
  }
 }
window.onload=changeColor;*/