//Chrome Drop Down Menu v2.01- Author: Dynamic Drive (http://www.dynamicdrive.com)



//Last updated: November 14th 06- added iframe shim technique







var cssdropdown={



disappeardelay: 250, //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?



enableswipe: 1, //enable swipe effect? 1 for yes, 0 for no



enableiframeshim: 1, //enable "iframe shim" technique to get drop down menus to correctly appear on top of controls such as form objects in IE5.5/IE6? 1 for yes, 0 for no







//No need to edit beyond here////////////////////////



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







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=-3



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



this.clearhidemenu()



if (this.ie||this.firefox){



obj.onmouseout=function(){cssdropdown.delayhidemenu()}



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-0+"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'



},







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")



for (var i=0; i<menuitems.length; i++){



if (menuitems[i].getAttribute("rel")){



var relvalue=menuitems[i].getAttribute("rel")



menuitems[i].onmouseover=function(e){



var event=typeof e!="undefined"? e : window.event



cssdropdown.dropit(this,event,this.getAttribute("rel"))



}



}



}



}



if (window.createPopup && !window.XmlHttpRequest){ //if IE5.5 to IE6, create iframe for iframe shim technique



document.write('<IFRAME id="iframeshim"  src="" 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



}



}







}