// JavaScript Document
/**
*菜单的构造,需要绑定到onload
*/


	function onzhuan(txt)
	{
		for( var i=1; i<=4; i++)
		{

				document.getElementById("nav_"+i ).style.display = "none";
				document.getElementById( "bli_"+i ).className = "zhuan_out";
		}
				document.getElementById("nav_"+txt ).style.display = "block";
				document.getElementById( "bli_"+txt ).className = "zhuan_on";
	}
	
if(document.getElementById("cont_right").scrollHeight>document.getElementById("cont_left").scrollHeight)
{
document.getElementById("cont_left").style.height=document.getElementById("cont_right").scrollHeight+"px";
}
else{
document.getElementById("cont_right").style.height=document.getElementById("cont_left").scrollHeight+"px";
}