137 lines
6.1 KiB
JavaScript
137 lines
6.1 KiB
JavaScript
//Drop Down/ Overlapping Content: http://www.dynamicdrive.com
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//**Updated: Dec 19th, 07': Added ability to dynamically populate a Drop Down content using an external file (Ajax feature)
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//**Updated: Feb 29th, 08':
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//1) Added ability to reveal drop down content via "click" of anchor link (instead of default "mouseover")
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//2) Added ability to disable drop down content from auto hiding when mouse rolls out of it
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//3) Added hidediv(id) public function to directly hide drop down div dynamically
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//**Updated: Sept 11th, 08': Fixed bug whereby drop down content isn't revealed onClick of anchor in Safari/ Google Chrome
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//**Updated: April 9th, 10': Minor change
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var dropdowncontent={
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disableanchorlink: true, //when user clicks on anchor link, should link itself be disabled (always true if "revealbehavior" above set to "click")
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hidedivmouseout: [true, 200], //Set hiding behavior within Drop Down DIV itself: [hide_div_onmouseover?, miliseconds_before_hiding]
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ajaxloadingmsg: "Loading content. Please wait...", //HTML to show while ajax page is being feched, if applicable
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ajaxbustcache: true, //Bust cache when fetching Ajax pages?
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getposOffset:function(what, offsettype){
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return (what.offsetParent)? what[offsettype]+this.getposOffset(what.offsetParent, offsettype) : what[offsettype]
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},
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isContained:function(m, e){
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var e=window.event || e
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var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement)
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while (c && c!=m)try {c=c.parentNode} catch(e){c=m}
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if (c==m)
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return true
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else
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return false
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},
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show:function(anchorobj, subobj, e){
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if (!this.isContained(anchorobj, e) || (e && e.type=="click")){
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var e=window.event || e
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if (e.type=="click" && subobj.style.visibility=="visible"){
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subobj.style.visibility="hidden"
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return
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}
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var horizontaloffset=(subobj.dropposition[0]=="left")? -(subobj.offsetWidth-anchorobj.offsetWidth) : 0 //calculate user added horizontal offset
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var verticaloffset=(subobj.dropposition[1]=="top")? -subobj.offsetHeight : anchorobj.offsetHeight //calculate user added vertical offset
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subobj.style.left=this.getposOffset(anchorobj, "offsetLeft") + horizontaloffset + "px"
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subobj.style.top=this.getposOffset(anchorobj, "offsetTop")+verticaloffset+"px"
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subobj.style.clip=(subobj.dropposition[1]=="top")? "rect(auto auto auto 0)" : "rect(0 auto 0 0)" //hide drop down box initially via clipping
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subobj.style.visibility="visible"
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subobj.startTime=new Date().getTime()
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subobj.contentheight=parseInt(subobj.offsetHeight)
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if (typeof window["hidetimer_"+subobj.id]!="undefined") //clear timer that hides drop down box?
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clearTimeout(window["hidetimer_"+subobj.id])
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this.slideengine(subobj, (subobj.dropposition[1]=="top")? "up" : "down")
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}
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},
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curveincrement:function(percent){
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return (1-Math.cos(percent*Math.PI)) / 2 //return cos curve based value from a percentage input
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},
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slideengine:function(obj, direction){
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var elapsed=new Date().getTime()-obj.startTime //get time animation has run
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if (elapsed<obj.glidetime){ //if time run is less than specified length
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var distancepercent=(direction=="down")? this.curveincrement(elapsed/obj.glidetime) : 1-this.curveincrement(elapsed/obj.glidetime)
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var currentclip=(distancepercent*obj.contentheight)+"px"
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obj.style.clip=(direction=="down")? "rect(0 auto "+currentclip+" 0)" : "rect("+currentclip+" auto auto 0)"
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window["glidetimer_"+obj.id]=setTimeout(function(){dropdowncontent.slideengine(obj, direction)}, 10)
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}
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else{ //if animation finished
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obj.style.clip="rect(0 auto auto 0)"
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}
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},
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hide:function(activeobj, subobj, e){
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if (!dropdowncontent.isContained(activeobj, e)){
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window["hidetimer_"+subobj.id]=setTimeout(function(){
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subobj.style.visibility="hidden"
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subobj.style.left=subobj.style.top=0
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clearTimeout(window["glidetimer_"+subobj.id])
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}, dropdowncontent.hidedivmouseout[1])
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}
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},
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hidediv:function(subobjid){
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document.getElementById(subobjid).style.visibility="hidden"
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},
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ajaxconnect:function(pageurl, divId){
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var page_request = false
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var bustcacheparameter=""
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if (window.XMLHttpRequest) // if Mozilla, IE7, Safari etc
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page_request = new XMLHttpRequest()
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else if (window.ActiveXObject){ // if IE6 or below
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try {
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page_request = new ActiveXObject("Msxml2.XMLHTTP")
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}
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catch (e){
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try{
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page_request = new ActiveXObject("Microsoft.XMLHTTP")
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}
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catch (e){}
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}
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}
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else
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return false
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document.getElementById(divId).innerHTML=this.ajaxloadingmsg //Display "fetching page message"
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page_request.onreadystatechange=function(){dropdowncontent.loadpage(page_request, divId)}
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if (this.ajaxbustcache) //if bust caching of external page
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bustcacheparameter=(pageurl.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
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page_request.open('GET', pageurl+bustcacheparameter, true)
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page_request.send(null)
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},
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loadpage:function(page_request, divId){
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if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1)){
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document.getElementById(divId).innerHTML=page_request.responseText
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}
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},
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init:function(anchorid, pos, glidetime, revealbehavior){
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var anchorobj=document.getElementById(anchorid)
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if (anchorobj)
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var subobj=document.getElementById(anchorobj.getAttribute("rel"))
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if (!anchorobj || !subobj)
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return
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var subobjsource=anchorobj.getAttribute("rev")
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if (subobjsource!=null && subobjsource!="")
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this.ajaxconnect(subobjsource, anchorobj.getAttribute("rel"))
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subobj.dropposition=pos.split("-")
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subobj.glidetime=glidetime || 1000
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subobj.style.left=subobj.style.top=0
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if (typeof revealbehavior=="undefined" || revealbehavior=="mouseover"){
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anchorobj.onmouseover=function(e){dropdowncontent.show(this, subobj, e)}
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anchorobj.onmouseout=function(e){dropdowncontent.hide(subobj, subobj, e)}
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if (this.disableanchorlink) anchorobj.onclick=function(){return false}
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}
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else
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anchorobj.onclick=function(e){dropdowncontent.show(this, subobj, e); return false}
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if (this.hidedivmouseout[0]==true) //hide drop down DIV when mouse rolls out of it?
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subobj.onmouseout=function(e){dropdowncontent.hide(this, subobj, e)}
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}
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} |