var cssdropdown={
disappeardelay: 250, 
disablemenuclick: false, 
enableswipe: 0, 
enableiframeshim: 1, 

dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, swipetimer: undefined, bottomclip:0,prevItem:'',

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;
},

swipeeffect:function()
{
    if (this.bottomclip<parseInt(this.dropmenuobj.offsetHeight))
    {
        this.bottomclip+=10+(this.bottomclip/10) //unclip drop down menu visibility gradually
        this.dropmenuobj.style.clip="rect(0 auto "+this.bottomclip+"px 0)"
    }
else
return
    this.swipetimer=setTimeout("cssdropdown.swipeeffect()", 10)
},

showhide:function(obj, e)
{
    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 (this.enableswipe==1)
        {
            if (typeof this.swipetimer!="undefined")
            clearTimeout(this.swipetimer)
            obj.clip="rect(0 auto 0 0)" //hide menu via clipping
            this.bottomclip=0
            this.swipeeffect()
        }
        obj.visibility="visible"
    }
    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.iecompattest().scrollLeft+this.iecompattest().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.iecompattest().scrollTop : window.pageYOffset
    var windowedge=this.ie && !window.opera? this.iecompattest().scrollTop+this.iecompattest().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
    }
}
return edgeoffset
},

dropit:function(obj, e, dropmenuID)
{
    
    if (this.dropmenuobj!=null) //hide previous menu
    this.dropmenuobj.style.visibility="hidden" //hide menu
      
    // change css for previous onmouseover link blank
    if(cssdropdown.prevItem!= obj.id && cssdropdown.prevItem!='')
    {
     document.getElementById(cssdropdown.prevItem).className = '';
    }    
    this.clearhidemenu()
    if (this.ie||this.firefox)
    {
        obj.onmouseout=function()
        {
            cssdropdown.delayhidemenu()
             cssdropdown.prevItem = obj.id; //preserve cell id for changging this cell class
      
        }   
         this.prevItem = obj.id;        
        obj.onclick=function(){return !cssdropdown.disablemenuclick} //disable main menu item link onclick?
        this.dropmenuobj=document.getElementById(dropmenuID)
        this.dropmenuobj.onmouseover=function(){cssdropdown.clearhidemenu()}
        this.dropmenuobj.onmouseout=function(e){cssdropdown.dynamichide(e)}
        this.dropmenuobj.onclick=function(){cssdropdown.delayhidemenu()}
        this.showhide(this.dropmenuobj.style, e)
        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.positionshim() //call iframe shim function
    }
 
},

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'   
    if(cssdropdown.prevItem!='')
    {
     document.getElementById(cssdropdown.prevItem).className = '';
    }
},

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

dynamichide:function(e)
{
    
    var evtobj=window.event? window.event : e
    if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
    this.delayhidemenu()
    else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
    this.delayhidemenu()  
       
},

delayhidemenu:function()
{
    this.delayhide=setTimeout("cssdropdown.dropmenuobj.style.visibility='hidden'; cssdropdown.hideshim()",this.disappeardelay) //hide menu
 
},

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

startchrome:function()
{
    for (var ids=0; ids<arguments.length; ids++)
    {
        var menuitems=document.getElementById(arguments[ids]).getElementsByTagName("a")
        var tdItem = document.getElementById(arguments[ids]).getElementsByTagName("td")
        for (var i=0; i<menuitems.length; i++)
        {
            if (menuitems[i].getAttribute("rel"))
            {
                var relvalue=menuitems[i].getAttribute("rel")
                var menuItemId = document.getElementById(relvalue);
                var MenuItem = document.getElementById(menuItemId.id).getElementsByTagName("a");
                  //check if there are more than 0 link availabe in the item.                   
                  if(MenuItem.length>0)
                   tdItem[i].onmouseover=function(e)
                   {                      
                       var event=typeof e!="undefined"? e : window.event
                       cssdropdown.dropit(this,event,this.getElementsByTagName("a")[0].getAttribute("rel"))
                       this.className = "onmouse";
                   }
                  
            }
        }
    }
    if (window.createPopup && !window.XmlHttpRequest)
    { //if IE5.5 to IE6, create iframe for iframe shim technique
        document.write('<IFRAME id="iframeshim"  src="NoWarning" style="display: none; left: 0; top: 0; z-index: 90; position: absolute; filter: progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)" frameBorder="0" scrolling="no"></IFRAME>')
        this.shimobject=document.getElementById("iframeshim") //reference iframe object
    }
 }
}