//** Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com) //** Updated: July 14th 06' to v2.0 //1) Ability to "left", "center", or "right" align the menu items easily, just by modifying the CSS property "text-align". //2) Added an optional "swipe down" transitional effect for revealing the drop down menus. //3) Support for multiple Chrome menus on the same page. //** Updated: Nov 14th 06' to v2.01- added iframe shim technique //** Updated: July 23rd, 08 to v2.4 //1) Main menu items now remain "selected" (CSS class "selected" applied) when user moves mouse into corresponding drop down menu. //2) Adds ability to specify arbitrary HTML that gets added to the end of each menu item that carries a drop down menu (ie: a down arrow image). //3) All event handlers added to the menu are now unobstrusive, allowing you to define your own "onmouseover" or "onclick" events on the menu items. //4) Fixed elusive JS error in FF that sometimes occurs when mouse quickly moves between main menu items and drop down menus //** Updated: Oct 29th, 08 to v2.5 (only .js file modified from v2.4) //1) Added ability to customize reveal animation speed (# of steps) //2) Menu now works in IE8 beta2 (a valid doctype at the top of the page is required) var cssdropdown={ disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout dropdownindicator: '', //specify full HTML to add to end of each menu item with a drop down menu enablereveal: [true, 5], //enable swipe effect? [true/false, steps (Number of animation steps. Integer between 1-20. Smaller=faster)] enableiframeshim: 1, //enable "iframe shim" in IE5.5 to IE7? (1=yes, 0=no) //No need to edit beyond here//////////////////////// dropmenuobj: null, asscmenuitem: null, domsupport: document.all || document.getElementById, standardbody: null, iframeshimadded: false, revealtimers: {}, 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; }, css:function(el, targetclass, action){ var needle=new RegExp("(^|\\s+)"+targetclass+"($|\\s+)", "ig") if (action=="check") return needle.test(el.className) else if (action=="remove") el.className=el.className.replace(needle, "") else if (action=="add" && !needle.test(el.className)) el.className+=" "+targetclass }, showmenu:function(dropmenu, e){ if (this.enablereveal[0]){ if (!dropmenu._trueheight || dropmenu._trueheight<10) dropmenu._trueheight=dropmenu.offsetHeight clearTimeout(this.revealtimers[dropmenu.id]) dropmenu.style.height=dropmenu._curheight=0 dropmenu.style.overflow="hidden" dropmenu.style.visibility="visible" this.revealtimers[dropmenu.id]=setInterval(function(){cssdropdown.revealmenu(dropmenu)}, 10) } else{ dropmenu.style.visibility="visible" } this.css(this.asscmenuitem, "selected", "add") }, revealmenu:function(dropmenu, dir){ var curH=dropmenu._curheight, maxH=dropmenu._trueheight, steps=this.enablereveal[1] if (curH< dropmenuW) //move menu to the left? edgeoffset=dropmenuW-obj.offsetWidth } else{ var topedge=document.all && !window.opera? this.standardbody.scrollTop : window.pageYOffset var windowedge=document.all && !window.opera? this.standardbody.scrollTop+this.standardbody.clientHeight-15 : window.pageYOffset+window.innerHeight-18 var dropmenuH=this.dropmenuobj._trueheight if (windowedge-this.dropmenuobj.y < dropmenuH){ //move up? edgeoffset=dropmenuH+obj.offsetHeight if ((this.dropmenuobj.y-topedge)') this.shimobject=document.getElementById("iframeshim") //reference iframe object this.shimobject.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)' this.iframeshimadded=true } } //end startchrome }