//** Drill Down Menu v1.0- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Script Download/ instructions page: http://www.dynamicdrive.com/dynamicindex1/drilldownmenu.htm
//** June 8th, 2009: Script Creation date
//** June 10th, 2009: v1.01: Minor update
//Version 1.5: June 21st, 09':
//**1) Ability to include menu from external file and added to page via Ajax
//**2) Adds support for arbitrary links to act as "back buttons" for a drill menu. Just give the link a rel="drillback-menuid" attribute
//**3) Adds drillmenuinstance.back() method, which can be called on demand to go back one level within drill menu
//**4) Fixes bug with background ULs being visible following foreground UL contents
//**5) Updated css so browsers with JS disabled will get a scrolling, fixed height UL
//Version 1.6: August 9th, 09': Adds ability to specify explicit height for main menu, instead of defaulting to top UL's natural height.
function drilldownmenu(setting){
this.sublevelarrow={src:'right.gif', width:'8px', top:'3px', left:'6px'} //full URL to image used to indicate there's a sub level
this.breadcrumbarrow='right.gif' //full URL to image separating breadcrumb links (if it's defined)
this.loadingimage='loader.gif' //full URL to 'loading' image, if menu is loaded via Ajax
this.homecrumbtext='Home Dir' //Top level crumb text
this.titlelength=35 //length of parent LI text to extract from to use as crumb titles
this.backarrow='leftarrow.gif' //full URL to image added in front of back LI
////////// No need to edit beyond here /////////////
this.menuid=setting.menuid
this.$menudiv=null
this.mainul=null
this.$uls=null
this.navdivs={}
this.menuheight=setting.menuheight || 'auto'
this.selectedul=setting.selectedul || null
this.speed=setting.speed || 70
this.persist=setting.persist || {enable: false, overrideselectedurl: false}
this.$arrowimgs=null
this.currentul=0
this.filesetting=setting.filesetting || {url: null, targetElement: null}
this.zIndexvalue=100
this.arrowposx=0 //default arrow x position relative to parent LI
var thisdrill=this
jQuery.noConflict()
jQuery(document).ready(function($){
if (thisdrill.filesetting.url && thisdrill.filesetting.url.length>0){ //menu defined inside external file (use Ajax)?
var $dest=(typeof thisdrill.filesetting.targetElement=="string")? $('#'+thisdrill.filesetting.targetElement) : null
if (!$dest || $dest.length!=1){ //if target element isn't defined or multiple targets found
alert("Error: The target element \"" + thisdrill.filesetting.targetElement + "\" to add the menu into doesn't exist or is incorrectly specified.")
return
}
$dest.html(' Loading Drill Down Menu...')
$.ajax({
url: thisdrill.filesetting.url,
error:function(ajaxrequest){
alert('Error fetching Ajax content.\nServer Response: '+ajaxrequest.responseText)
}, //end error
success:function(content){
$dest.html(content)
thisdrill.init($, setting)
} //end success
}) //end ajax
}
else{ //if inline menu
thisdrill.init($, setting)
}
}) //end document.ready
}
drilldownmenu.prototype.init=function($, setting){
var thisdrill=this
var $maindiv=$('#'+setting.menuid).css({position:'relative'}) //relative position main DIV
var $uls=$maindiv.find('ul')
$uls.css({position:'absolute', left:0, top:0, visibility:'hidden'}) //absolutely position ULs
this.$maindiv=$maindiv
this.$uls=$uls
this.navdivs.$crumb=$('#'+setting.breadcrumbid)
this.navdivs.$backbuttons=$('a[rel^="drillback-'+setting.menuid+'"]').css({outline:'none'}).click(function(e){
thisdrill.back()
e.preventDefault()
})
this.buildmenu($)
$(window).bind('unload', function(){
thisdrill.uninit()
})
setting=null
}
drilldownmenu.prototype.buildmenu=function($){
var thisdrill=this
this.$uls.each(function(i){ //loop through each UL
var $thisul=$(this)
if (i==0){ //if topmost UL
$('
Site Navigation').prependTo($thisul).click(function(e){e.preventDefault()})
thisdrill.$maindiv.css({height:(thisdrill.menuheight=='auto')? $thisul.outerHeight() : parseInt(thisdrill.menuheight), overflow:'hidden'}) //set main menu DIV's height to top level UL's height
.data('h', parseInt(thisdrill.$maindiv.css('height')))
}
else{ //if this isn't the topmost UL
var $parentul=$thisul.parents('ul:eq(0)')
var $parentli=$thisul.parents('li:eq(0)')
$(' Back one level') //add back LI item
.click(function(e){thisdrill.back(); e.preventDefault()})
.prependTo($thisul)
var $anchorlink=$parentli.children('a:eq(0)').css({outline:'none'}).data('control', {order:i}) //remove outline from anchor links
var $arrowimg=$('').attr('src', thisdrill.sublevelarrow.src).css({position:'absolute', borderWidth:0, paddingTop:thisdrill.sublevelarrow.top, left:$parentli.width()-parseInt(thisdrill.sublevelarrow.width)-parseInt(thisdrill.sublevelarrow.left)}).prependTo($anchorlink)
$anchorlink.click(function(e){ //assign click behavior to anchor link
thisdrill.slidemenu(jQuery(this).data('control').order)
e.preventDefault()
})
}
var ulheight=($thisul.outerHeight() < thisdrill.$maindiv.data('h'))? thisdrill.$maindiv.data('h') : 'auto'
$thisul.css({visibility:'visible', width:'100%', height:ulheight, left:(i==0)? 'auto' : $parentli.outerWidth(), top:0})
$thisul.data('specs', {w:$thisul.outerWidth(), h:$thisul.outerHeight(), order:i, parentorder:(i==0)? -1 : $anchorlink.parents('ul:eq(0)').data('specs').order, x:(i==0)? $thisul.position().left : $parentul.data('specs').x+$parentul.data('specs').w, title:(i==0)? thisdrill.homecrumbtext : $parentli.find('a:eq(0)').text().substring(0, thisdrill.titlelength)})
}) //end UL loop
var selectedulcheck=this.selectedul && document.getElementById(this.selectedul) //check if "selectedul" defined, plus if actual element exists
this.$arrowimgs=this.$maindiv.find('img.arrowclass')
this.arrowposx=parseInt(this.$arrowimgs.eq(0).css('left')) //get default x position of arrow
if (window.opera)
this.$uls.eq(0).css({zIndex: this.zIndexvalue}) //Opera seems to require this in order for top level arrows to show
if (this.persist.enable && (this.persist.overrideselectedul || !this.persist.overrideselectedul && !selectedulcheck) && drilldownmenu.routines.getCookie(this.menuid)){ //go to last persisted UL?
var ulorder=parseInt(drilldownmenu.routines.getCookie(this.menuid))
this.slidemenu(ulorder, true)
}
else if (selectedulcheck){ //if "selectedul" setting defined, slide to that UL by default
var ulorder=$('#'+this.selectedul).data('specs').order
this.slidemenu(ulorder, true)
}
else{
this.slidemenu(0, true)
}
this.navdivs.$crumb.click(function(e){ //assign click behavior to breadcrumb div
if (e.target.tagName=="A"){
var order=parseInt(e.target.getAttribute('rel'))
if (!isNaN(order)){ //check link contains a valid rel attribute int value (is anchor link)
thisdrill.slidemenu(order)
e.preventDefault()
}
}
})
}
drilldownmenu.prototype.slidemenu=function(order, disableanimate){
var order=isNaN(order)? 0 : order
this.$uls.css({display: 'none'})
var $targetul=this.$uls.eq(order).css({zIndex: this.zIndexvalue++})
$targetul.parents('ul').andSelf().css({display: 'block'})
this.currentul=order
if ($targetul.data('specs').h > this.$maindiv.data('h')){
this.$maindiv.css({overflowY:'auto'}).scrollTop(0)
this.$arrowimgs.css('left', this.arrowposx-15) //adjust arrow position if scrollbar is added
}
else{
this.$maindiv.css({overflowY: 'hidden'}).scrollTop(0)
this.$arrowimgs.css('left', this.arrowposx)
}
this.updatenav($, order)
this.$uls.eq(0).animate({left:-$targetul.data('specs').x}, typeof disableanimate!="undefined"? 0 : this.speed)
}
drilldownmenu.prototype.back=function(){
if (this.currentul>0){
var order=this.$uls.eq(this.currentul).parents('ul:eq(0)').data('specs').order
this.slidemenu(order)
}
}
drilldownmenu.prototype.updatenav=function($, endorder){
var $currentul=this.$uls.eq(endorder)
if (this.navdivs.$crumb.length==1){ //if breadcrumb div defined
var $crumb=this.navdivs.$crumb.empty()
if (endorder>0){ //if this isn't the topmost UL (no point in showing crumbs if it is)
var crumbhtml=''
while ($currentul && $currentul.data('specs').order>=0){
crumbhtml=' '+$currentul.data('specs').title+''+crumbhtml
$currentul=($currentul.data('specs').order>0)? this.$uls.eq($currentul.data('specs').parentorder) : null
}
$crumb.append(crumbhtml).find('img:eq(0)').remove().end().find('a:last').replaceWith(this.$uls.eq(endorder).data('specs').title) //remove link from very last crumb trail
}
else{
$crumb.append(this.homecrumbtext)
}
}
if (this.navdivs.$backbuttons.length>0){ //if back buttons found
if (!/Safari/i.test(navigator.userAgent)) //exclude Safari from button state toggling due to bug when the button is an image link
this.navdivs.$backbuttons.css((endorder>0)? {opacity:1, cursor:'pointer'} : {opacity:0.5, cursor:'default'})
}
}
drilldownmenu.prototype.uninit=function(){
if (this.persist.enable)
drilldownmenu.routines.setCookie(this.menuid, this.currentul)
}
drilldownmenu.routines={
getCookie:function(Name){
var re=new RegExp(Name+"=[^;]*", "i"); //construct RE to search for target name/value pair
if (document.cookie.match(re)) //if cookie found
return document.cookie.match(re)[0].split("=")[1] //return its value
return null
},
setCookie:function(name, value){
document.cookie = name+"="+value+"; path=/"
}
}