/*div左右对应拉伸*/
window.onload=function(){
	/*if(!document.getElementById("leftSide"))
		return;
	if(!document.getElementById("rightSide"))
		return;
	var MR=document.getElementById("rightSide").offsetHeight;
	var ML=document.getElementById("leftSide").offsetHeight;
		if (MR>ML){
			document.getElementById("leftSide").style.height=document.getElementById("rightSide").offsetHeight+"px";
		}
		else{
			document.getElementById("rightSide").style.height=document.getElementById("leftSide").offsetHeight-200+"px";
		}*/
}