var dropping_menu={

transition: {overtime:300, outtime:300}, //duration of slide in/ out animation, in milliseconds
showhidedelay: {showdelay: 100, hidedelay: 200}, //set delay in milliseconds before sub menus appear and disappear, respectively

detectwebkit: navigator.userAgent.toLowerCase().indexOf("applewebkit")!=-1, //detect WebKit browsers (Safari, Chrome etc)
detectie6: document.all && !window.XMLHttpRequest,
css3support: window.msPerformance || (!document.all && document.querySelector), //detect browsers that support CSS3 box shadows (ie9+ or FF3.5+, Safari3+, Chrome etc)

buildmenu:function($, setting){
	var min_left_offset = 0;
	var smoothmenu=dropping_menu
	var $mainmenu=$("#"+setting.mainmenuid+">ul") //reference main menu UL
	$mainmenu.parent().get(0).className=setting.classname || "dropping_menu"
	var $headers=$mainmenu.find("ul").parent()
	$headers.hover(
		function(e){
			$(this).children('a:eq(0)').addClass('selected')
		},
		function(e){
			$(this).children('a:eq(0)').removeClass('selected')
		}
	)
	$headers.each(function(i){ //loop through each LI header
		var $curobj=$(this).css({zIndex: 100-i}) //reference current LI header
		var $subul=$(this).find('ul:eq(0)').css({display:'block'})
		if(min_left_offset == 0) {
			min_left_offset = $subul.offset().left; }
		$subul.data('timers', {})
		this._dimensions={w:this.offsetWidth, h:this.offsetHeight, subulw:$subul.outerWidth(), subulh:$subul.outerHeight()}
		this.istopheader=$curobj.parents("ul").length==1? true : false //is top level header?
		$subul.css({top:this.istopheader && setting.orientation!='v'? this._dimensions.h+"px" : 0})
		$curobj.hover(
			function(e){				
				var $targetul=$subul //reference UL to reveal
				var header=$curobj.get(0) //reference header LI as DOM object
				clearTimeout($targetul.data('timers').hidetimer)
				$targetul.data('timers').showtimer=setTimeout(function(){
					header._offsets={left:$curobj.offset().left, top:$curobj.offset().top}
					var menuleft=min_left_offset-$curobj.offset().left-18; // Offset-left from parent
					var menutop=header._dimensions.h+1; // Offset-top from parent
					var menuwidth=654; //header._dimensions.subulw; // Sub-Menu-width
					if ($targetul.queue().length<=1){ //if 1 or less queued animations
						$targetul.css({left:menuleft+"px", width:menuwidth+"px", top:menutop+"px"}).animate({
							height:'show',opacity:'show'}, dropping_menu.transition.overtime)
					}
				}, dropping_menu.showhidedelay.showdelay)
			},
			function(e){
				var $targetul=$subul
				var header=$curobj.get(0)
				clearTimeout($targetul.data('timers').showtimer)
				$targetul.data('timers').hidetimer=setTimeout(function(){
					$targetul.animate({height:'hide', opacity:'hide'}, dropping_menu.transition.outtime)
				}, dropping_menu.showhidedelay.hidedelay)
			}
		) //end hover
	}) //end $headers.each()
	$mainmenu.find("ul").css({display:'none', visibility:'visible'})
},

init:function(setting){
	dropping_menu.buildmenu($, setting);
}

}