//下拉菜单相关代码
var h;
var w;
var l;
var t;
var topMar = 1;
var leftMar = -2;
var space = 1;
var isvisible;
var MENU_SHADOW_COLOR='#999999';//定义下拉菜单阴影色
var global = window.document
global.fo_currentMenu = null
global.fo_shadows = new Array
function HideMenu()
{
var mX;
var mY;
var vDiv;
var mDiv;
if (isvisible == true)
{
vDiv = document.all("menuDiv");
mX = window.event.clientX + document.body.scrollLeft;
mY = window.event.clientY + document.body.scrollTop;
if ((mX < parseInt(vDiv.style.left)) || (mX > parseInt(vDiv.style.left)+vDiv.offsetWidth) || (mY < parseInt(vDiv.style.top)-h) || (mY > parseInt(vDiv.style.top)+vDiv.offsetHeight)){
vDiv.style.visibility = "hidden";
isvisible = false;
}
}
}
function ShowMenu(vMnuCode,tWidth) {
vSrc = window.event.srcElement;
vMnuCode = "";
h = vSrc.offsetHeight;
w = vSrc.offsetWidth;
l = vSrc.offsetLeft + leftMar+4;
t = vSrc.offsetTop + topMar + h + space-2;
vParent = vSrc.offsetParent;
while (vParent.tagName.toUpperCase() != "BODY")
{
l += vParent.offsetLeft;
t += vParent.offsetTop;
vParent = vParent.offsetParent;
}
menuDiv.innerHTML = vMnuCode;
menuDiv.style.top = t;
menuDiv.style.left = l;
menuDiv.style.visibility = "visible";
isvisible = true;
makeRectangularDropShadow(submenu, MENU_SHADOW_COLOR, 4)
}
function makeRectangularDropShadow(el, color, size)
{
var i;
for (i=size; i>0; i--)
{
var rect = document.createElement('div');
var rs = rect.style
rs.position = 'absolute';
rs.left = (el.style.posLeft + i) + 'px';
rs.top = (el.style.posTop + i) + 'px';
rs.width = el.offsetWidth + 'px';
rs.height = el.offsetHeight + 'px';
rs.zIndex = el.style.zIndex - i;
rs.backgroundColor = color;
var opacity = 1 - i / (i + 1);
rs.filter = 'alpha(opacity=' + (100 * opacity) + ')';
el.insertAdjacentElement('afterEnd', rect);
global.fo_shadows[global.fo_shadows.length] = rect;
}
}