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MyMagicalPants
02-19-2008, 06:25 PM
1) Drop Down Tabs (5 styles)

2) http://www.dynamicdrive.com/dynamicindex1/droptabmenu.htm

3) In this script (dropdowntabs.js) there is supposed to be a fix to cover up the select box using an iframe shim. The problem is it doesn't work. At the top of the js file, there's a control to turn on this fix:

enableiframeshim: 1, //1 or 0, for true or false

The error appears to be that there is an undefined object. The object being called up is: this.shimobject but nowhere on the page is "shimobject" defined. Just to make sure I didn't make a mistake on my end, I downloaded the sample pages and they are broken just the same when I stick in a select box.

Does anybody have a fix for this?

jscheuer1
02-25-2008, 10:49 AM
As near as I can tell, the code for enabling the iframe shim was never completed. I made this modified dropdowntabs.js file:


//Drop Down Tabs Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Created: May 16th, 07'

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

//No need to edit beyond here////////////////////////
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"
}
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.hideshim();tabdropdown.dropmenuobj.style.visibility='hidden'; if (obj2.parentNode.className.indexOf('default')==-1) obj2.parentNode.className=''},this.disappeardelay) //hide menu
},

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

positionshim:function(){ //display iframe shim function
if (this.enableiframeshim && this.shimobject){
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 && this.shimobject)
this.shimobject.style.display='none'
},

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

init:function(menuid, dselected){
if(this.enableiframeshim&&typeof this.shimobject=='undefined')
this.shimobject=(this.shimobject=document.getElementById('iframe_shim'))? this.shimobject : null;
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"
}
}

}

and added this to the page, right after the opening <body> tag:


<!--[if IE]>
<iframe id="iframe_shim" src="about:blank" style="position:absolute;display:none;" scrolling="no" frameborder="0"></iframe>
<![endif]-->


Now, that really should be:


<!--[if lte IE 6]>
<iframe id="iframe_shim" src="about:blank" style="position:absolute;display:none;" scrolling="no" frameborder="0"></iframe>
<![endif]-->


But, as many folks test in IE 6 'stand alone', it usually will not know what version it is. So the former would be needed to see results.