// 控制左右层高度相等 *符合多种浏览器* 
var left=document.getElementById("sidebar").scrollHeight
var center=document.getElementById("content1").scrollHeight
var right=document.getElementById("sidebar1").scrollHeight

if(center>left)
{
document.getElementById("sidebar").style.height=document.getElementById("sidebar1").style.height=document.getElementById("content1").scrollHeight+"px"
}
else if(left>center)
{
document.getElementById("content1").style.height=document.getElementById("sidebar1").style.height=document.getElementById("sidebar").scrollHeight+"px"
}
else
{
document.getElementById("content1").style.height=document.getElementById("sidebar").style.height=document.getElementById("sidebar1").scrollHeight+"px"
}