//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 Arrayfunction 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 = "<table id='submenu' cellspacing=1 cellpadding=3 style='width:"+tWidth+"' class=menu onmouseout='HideMenu()'><tr height=23><td nowrap align=left class=MenuBody>" + vMnuCode + "</td></tr></table>";	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;	}}