var ua = navigator.userAgent.toLowerCase();
var isIE = (ua.indexOf("msie") > -1),isIE7 = (ua.indexOf("msie 7") > -1),isOpera = (ua.indexOf("opera") > -1),isSafari = (ua.indexOf("webkit") != -1 || ua.indexOf("khtml") != -1),isGecko = (!isSafari && ua.indexOf("gecko") > -1);

/*tag 切换 */
function setTab(m,n){
var tli=document.getElementById("tab_menu"+m).getElementsByTagName("li");
var mli=document.getElementById("tab_main"+m).getElementsByTagName("ol");
for(i=0;i<tli.length;i++){
   try { mli[i].style.display= i==n?"block":"none";} catch(err) { }
   tli[i].className= i==n?'on':'none';
}
}

/*头部二级菜单 */
mySlideOutMenu.Registry = []
mySlideOutMenu.aniLen = 250
mySlideOutMenu.hideDelay = 500
mySlideOutMenu.minCPUResolution = 10

// constructor
function mySlideOutMenu(id, dir, left, top, width, height)
{
	this.ie  = document.all ? 1 : 0
	this.ns4 = document.layers ? 1 : 0
	this.dom = document.getElementById ? 1 : 0
	this.css = "";
	if (this.ie || this.ns4 || this.dom) {

		this.id			 = id
		this.dir		 = dir
		this.orientation = dir == "left" || dir == "right" ? "h" : "v"
		this.dirType	 = dir == "right" || dir == "down" ? "-" : "+"
		this.dim		 = this.orientation == "h" ? width : height
		this.hideTimer	 = false
		this.aniTimer	 = false
		this.open		 = false
		this.over		 = false
		this.startTime	 = 0
		// global reference to this object
		this.gRef = "mySlideOutMenu_"+id
		eval(this.gRef+"=this")
		// add this menu object to an internal list of all menus
		mySlideOutMenu.Registry[id] = this
		var d = document
		var strCSS = "";
		strCSS += '#' + this.id + 'Container { visibility:hidden; '
		strCSS += 'left:' + left + 'px; '
		strCSS += 'top:' + top + 'px; '
		strCSS += 'width:' + width + 'px; '
		strCSS += 'height:' + height + 'px; '		
		strCSS += 'overflow:hidden; z-index:500; }'
		strCSS += '#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; '
		strCSS += '}'
		this.css = strCSS;
		this.load()
	}
}
mySlideOutMenu.writeCSS = function() {
	document.writeln('<style type="text/css">');
	for (var id in mySlideOutMenu.Registry) {
		document.writeln(mySlideOutMenu.Registry[id].css);
	}
	document.writeln('</style>');
}
mySlideOutMenu.prototype.load = function() {
	var d = document
	var lyrId1 = this.id + "Container"
	var lyrId2 = this.id + "Content"
	var obj1 = this.dom ? d.getElementById(lyrId1) : this.ie ? d.all[lyrId1] : d.layers[lyrId1]
	if (obj1) var obj2 = this.ns4 ? obj1.layers[lyrId2] : this.ie ? d.all[lyrId2] : d.getElementById(lyrId2)
	var temp
	if (!obj1 || !obj2) window.setTimeout(this.gRef + ".load()", 100)
	else {
		this.container	= obj1
		this.menu		= obj2
		this.style		= this.ns4 ? this.menu : this.menu.style
		this.homePos	= eval("0" + this.dirType + this.dim)
		this.outPos		= 0
		this.accelConst	= (this.outPos - this.homePos) / mySlideOutMenu.aniLen / mySlideOutMenu.aniLen 
		// set event handlers.
		if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
		this.menu.onmouseover = new Function("mySlideOutMenu.showMenu('" + this.id + "')")
		this.menu.onmouseout = new Function("mySlideOutMenu.hideMenu('" + this.id + "')")
		//set initial state
		this.endSlide()
	}
}
	
mySlideOutMenu.showMenu = function(id)
{
	var reg = mySlideOutMenu.Registry
	var obj = mySlideOutMenu.Registry[id]	
	if (obj.container) {
		obj.over = true
		// close other menus.
		for (menu in reg) if (id != menu) mySlideOutMenu.hide(menu)
		// if this menu is scheduled to close, cancel it.
		if (obj.hideTimer) { reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer) }
		// if this menu is closed, open it.
		if (!obj.open && !obj.aniTimer) reg[id].startSlide(true)
	}
}

mySlideOutMenu.hideMenu = function(id)
{
	// schedules the menu to close after <hideDelay> ms, which
	// gives the user time to cancel the action if they accidentally moused out
	var obj = mySlideOutMenu.Registry[id]
	if (obj.container) {
		if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
		obj.hideTimer = window.setTimeout("mySlideOutMenu.hide('" + id + "')", mySlideOutMenu.hideDelay);
	}
}

mySlideOutMenu.hideAll = function()
{
	var reg = mySlideOutMenu.Registry
	for (menu in reg) {
		mySlideOutMenu.hide(menu);
		if (menu.hideTimer) window.clearTimeout(menu.hideTimer);
	}
}

mySlideOutMenu.hide = function(id)
{
	var obj = mySlideOutMenu.Registry[id]
	obj.over = false
	if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
	// flag that this scheduled event has occured.
	obj.hideTimer = 0
	// if this menu is open, close it.
	if (obj.open && !obj.aniTimer) obj.startSlide(false)
}

mySlideOutMenu.prototype.startSlide = function(open) {
	this[open ? "onactivate" : "ondeactivate"]()
	this.open = open
	if (open) this.setVisibility(true)
	this.startTime = (new Date()).getTime()	
	this.aniTimer = window.setInterval(this.gRef + ".slide()", mySlideOutMenu.minCPUResolution)
}

mySlideOutMenu.prototype.slide = function() {
	var elapsed = (new Date()).getTime() - this.startTime
	if (elapsed > mySlideOutMenu.aniLen) this.endSlide()
	else {
		var d = Math.round(Math.pow(mySlideOutMenu.aniLen-elapsed, 2) * this.accelConst)
		if (this.open && this.dirType == "-")		d = -d
		else if (this.open && this.dirType == "+")	d = -d
		else if (!this.open && this.dirType == "-")	d = -this.dim + d
		else										d = this.dim + d
		this.moveTo(d)
	}
}

mySlideOutMenu.prototype.endSlide = function() {
	this.aniTimer = window.clearTimeout(this.aniTimer)
	this.moveTo(this.open ? this.outPos : this.homePos)
	if (!this.open) this.setVisibility(false)
	if ((this.open && !this.over) || (!this.open && this.over)) {
		this.startSlide(this.over)
	}
}

mySlideOutMenu.prototype.setVisibility = function(bShow) { 
	var s = this.ns4 ? this.container : this.container.style
	s.visibility = bShow ? "visible" : "hidden"
}
mySlideOutMenu.prototype.moveTo = function(p) { 
	this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : p + "px"
}
mySlideOutMenu.prototype.getPos = function(c) {
	return parseInt(this.style[c])
}

// events
mySlideOutMenu.prototype.onactivate		= function() { }
mySlideOutMenu.prototype.ondeactivate	= function() { }

	new mySlideOutMenu("menu1", "down",75,-23,500,41)//数值表示: (下拉菜单距离左侧位置, 0, 下拉菜单宽度, 41)注意:距离左侧位置与宽度相加不得超过1002px
	new mySlideOutMenu("menu2", "down", 200, -23, 600, 41)
	new mySlideOutMenu("menu3", "down", 630, -23, 600, 41)
	new mySlideOutMenu("menu4", "down",370,-23,600,41)
	new mySlideOutMenu("menu5", "down",560,-23,600,41)
	new mySlideOutMenu("menu6", "down",640,-23,300,41)
	new mySlideOutMenu("menu7", "down",670,0,300,41)
    mySlideOutMenu.writeCSS();