function cleardefaultdata()
{
	document.getElementById('zoom_query').onfocus=
	function()
	{
		if (this.value=='Search JavaScript Kit')
			this.value=''
	}
}

function disabledefaultsearch()
{
	document.getElementById('jksitesearch').onsubmit=
	function()
	{
		var searchvalue=document.getElementById('zoom_query').value
		if (searchvalue=='Search JavaScript Kit' || searchvalue=='')
		{
			alert('You haven\'t entered a search phrase yet!')
			return false
		}
	}
}

function setdefaultcategory()
{
	var catsection=document.getElementById('jksitesearch_cat')
	var categories=catsection.getElementsByTagName('input')	
	var docpath=location.pathname
	for (var i=0; i<categories.length; i++)
		categories[i].checked=false
	if (/(script\/)|(cutpastejava.shtml)/i.test(docpath))
		categories[1].checked=true
	else if (/(jsref\/)|(domref\/)|(filters\/)/i.test(docpath))
		categories[3].checked=true
	else if (/(javatutors\/)|(dhtmltutors\/)|(howto\/)/i.test(docpath))
		categories[2].checked=true
	else
		categories[0].checked=true
}

function togglecategories()
{
	var catsection=document.getElementById('jksitesearch_cat')
	var categories=catsection.getElementsByTagName('input')
	catsection.onclick=
	function(e)
	{
		var target=window.event? event.srcElement : e.target
		if (target.tagName=="INPUT")
		{
			if (target.value==-1)
			{
				for (var i=0; i<categories.length; i++)
					categories[i].checked=false
				target.checked=true
			}
			else
				categories[0].checked=false
		}
	}
}

var tabdropdown=
{
	disappeardelay: 200, //set delay in miliseconds before menu disappears onmouseout
	disablemenuclick: false, //when user clicks on a menu item with a drop down menu, disable menu item's link?
	enableiframeshim: 1, //1 or 0, for true or false
	islinux: /Linux/i.test(navigator.userAgent),

	dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, previousmenuitem:null,
	currentpageurl: window.location.href.replace("http://"+window.location.hostname, "").replace(/^\//, ""), //get current page url (minus hostname, ie: http://www.dynamicdrive.com/)

	getposOffset:
	function(what, offsettype)
	{
		var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
		var parentEl=what.offsetParent;
			while (parentEl!=null)
			{
				totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
				parentEl=parentEl.offsetParent;
			}
		return totaloffset;
	},

	showhide:
	function(obj, e, obj2) //obj refers to drop down menu, obj2 refers to tab menu item mouse is currently over
	{
		if (this.ie || this.firefox)
			this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
		if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
		{
			if (obj2.parentNode.className.indexOf("default")==-1) //if tab isn't a default selected one
				obj2.parentNode.className="selected"
			obj.visibility="visible"
			this.hidebanner()
		}
		else if (e.type=="click")
			obj.visibility="hidden"
	},

	iecompattest:
	function()
	{
		return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
	},

	clearbrowseredge:
	function(obj, whichedge)
	{
		var edgeoffset=0
		if (whichedge=="rightedge")
		{
			var windowedge=this.ie && !window.opera? this.standardbody.scrollLeft+this.standardbody.clientWidth-15 : window.pageXOffset+window.innerWidth-15
			this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetWidth
		if (windowedge-this.dropmenuobj.x < this.dropmenuobj.contentmeasure)  //move menu to the left?
			edgeoffset=this.dropmenuobj.contentmeasure-obj.offsetWidth
		}
		else
		{
			var topedge=this.ie && !window.opera? this.standardbody.scrollTop : window.pageYOffset
			var windowedge=this.ie && !window.opera? this.standardbody.scrollTop+this.standardbody.clientHeight-15 : window.pageYOffset+window.innerHeight-18
			this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight
			if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure) //move up?
			{
				edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
				if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) //up no good either?
					edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
			}
			this.dropmenuobj.firstlink.style.borderTopWidth=(edgeoffset==0)? 0 : "1px" //Add 1px top border to menu if dropping up
		}
		return edgeoffset
	},

	dropit:
	function(obj, e, dropmenuID)
	{
		if (this.dropmenuobj!=null) //hide previous menu
		{
			this.dropmenuobj.style.visibility="hidden" //hide menu
			if (this.previousmenuitem!=null && this.previousmenuitem!=obj)
			{
				if (this.previousmenuitem.parentNode.className.indexOf("default")==-1) //If the tab isn't a default selected one
					this.previousmenuitem.parentNode.className=""
			}
		}
		this.clearhidemenu()
		if (this.ie||this.firefox)
		{
			obj.onmouseout=
			function()
			{
				tabdropdown.delayhidemenu(obj)
			}
			obj.onclick=function()
			{
				return !tabdropdown.disablemenuclick //disable main menu item link onclick?
			}
			this.dropmenuobj=document.getElementById(dropmenuID)
			this.dropmenuobj.onmouseover=function(){tabdropdown.clearhidemenu()}
			this.dropmenuobj.onmouseout=function(e){tabdropdown.dynamichide(e, obj)}
			this.dropmenuobj.onclick=function(){tabdropdown.delayhidemenu(obj)}
			this.showhide(this.dropmenuobj.style, e, obj)
			this.dropmenuobj.x=this.getposOffset(obj, "left")
			this.dropmenuobj.y=this.getposOffset(obj, "top")
			this.dropmenuobj.style.left=this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge")+"px"
			this.dropmenuobj.style.top=this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+1+"px"
			this.previousmenuitem=obj //remember main menu item mouse moved out from (and into current menu item)
			this.positionshim() //call iframe shim function
		}
	},

	contains_firefox:
	function(a, b) 
	{
		while (b.parentNode)
		if ((b = b.parentNode) == a)
			return true;
		return false;
	},

	dynamichide:
	function(e, obj2) //obj2 refers to tab menu item mouse is currently over
	{
		var evtobj=window.event? window.event : e
		if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
			this.delayhidemenu(obj2)
		else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
			this.delayhidemenu(obj2)
	},

	delayhidemenu:
	function(obj2)
	{
		this.delayhide=setTimeout(function(){tabdropdown.dropmenuobj.style.visibility='hidden'; tabdropdown.showbanner(); if (obj2.parentNode.className.indexOf('default')==-1) obj2.parentNode.className=''},this.disappeardelay) //hide menu
	},

	clearhidemenu:
	function()
	{
		if (this.delayhide!="undefined"){
			clearTimeout(this.delayhide)
			this.hidebanner()
		}
	},

	 hidebanner:
	 function()
	 {
			if (this.islinux)
				document.getElementById('topbanner').style.visibility="hidden"
		},

	 showbanner:
	 function()
	 {
			if (this.islinux)
				document.getElementById('topbanner').style.visibility="visible"
		},
	
	positionshim:
	function() //display iframe shim function
	{
		if (this.enableiframeshim && typeof this.shimobject!="undefined"){
			if (this.dropmenuobj.style.visibility=="visible"){
				this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
				this.shimobject.style.height=this.dropmenuobj.offsetHeight+"px"
				this.shimobject.style.left=this.dropmenuobj.style.left
				this.shimobject.style.top=this.dropmenuobj.style.top
			}
		this.shimobject.style.display=(this.dropmenuobj.style.visibility=="visible")? "block" : "none"
		}
	},

	hideshim:
	function()
	{
		if (this.enableiframeshim && typeof this.shimobject!="undefined")
			this.shimobject.style.display='none'
	},

	isSelected:
	function(menuurl)
	{
		var menuurl=menuurl.replace("http://"+menuurl.hostname, "").replace(/^\//, "")
		return (tabdropdown.currentpageurl==menuurl)
	},

	init:
	function(menuid, dselected)
	{
		this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" across doctypes
		var menuitems=document.getElementById(menuid).getElementsByTagName("a")
		for (var i=0; i<menuitems.length; i++)
		{
			if (menuitems[i].getAttribute("rel"))
			{
				var relvalue=menuitems[i].getAttribute("rel")
				document.getElementById(relvalue).firstlink=document.getElementById(relvalue).getElementsByTagName("a")[0]
				menuitems[i].onmouseover=
				function(e)
				{
					var event=typeof e!="undefined"? e : window.event
					tabdropdown.dropit(this, event, this.getAttribute("rel"))
				}
			}
			if (dselected=="auto" && typeof setalready=="undefined" && this.isSelected(menuitems[i].href))
			{
				menuitems[i].parentNode.className+=" selected default"
				var setalready=true
			}
			else if (parseInt(dselected)==i)
				menuitems[i].parentNode.className+=" selected default"
		}
	}
}