// JavaScript Document
var intDelay=30; //设置菜单显示速度，越大越慢
var intInterval=5;
function MenuClick()
{
if (site.style.display=="")
{
GradientClose();
}
else{
site.filters.alpha.opacity=0;
site.style.display="";
GradientShow();
}
}
function GradientShow()
{
site.filters.alpha.opacity+=intInterval;
if (site.filters.alpha.opacity<100) setTimeout("GradientShow()",intDelay);
}
function GradientClose()
{
site.filters.alpha.opacity-=intInterval;
if (site.filters.alpha.opacity>0) {
setTimeout("GradientClose()",intDelay);
}
else {
site.style.display="none";
}
}