// 左右等高
function realheight()
{
var l=document.getElementById("left0").scrollHeight;
var r=document.getElementById("right0").scrollHeight

if (r>l)
{
document.getElementById("left0").style.height=r+"px";
document.body.style.height=r+420+"px";
}
else
{
document.getElementById("right0").style.height=l+"px";
document.body.style.height=l+420+"px";
}

}