//Specify full URL to down and right arrow images (23 is padding-right to add to top level LIs with drop downs):
/*var arrowimages={down:['downarrowclass', '<?php bloginfo('template_directory') ?>/images/down.png', 23],
right:['rightarrowclass', '<?php bloginfo('template_directory') ?>/images/right.png']}*/

var jqueryslidemenu={

animateduration: {over: 250, out: 250}, //duration of slide in/out animation, in milliseconds

buildmenu:function(menuid, arrowsvar){
	jQuery(document).ready(function(jQuery){
		var jQuerymainmenu=jQuery("#"+menuid+">ul")
		var jQueryheaders=jQuerymainmenu.find("ul").parent()
		jQueryheaders.each(function(i){
			var jQuerycurobj=jQuery(this)
			var jQuerysubul=jQuery(this).find('ul:eq(0)')
			this._dimensions={w:this.offsetWidth, h:this.offsetHeight, subulw:jQuerysubul.outerWidth(), subulh:jQuerysubul.outerHeight()}
			this.istopheader=jQuerycurobj.parents("ul").length==1? true : false
			jQuerysubul.css({top:this.istopheader? this._dimensions.h+"px" : 0})
			jQuerycurobj.children("a:eq(0)").css(this.istopheader? {paddingRight: arrowsvar.down[2]} : {}).append(
				'<img src="'+ (this.istopheader? arrowsvar.down[1] : arrowsvar.right[1]) +'" class="' + (this.istopheader? arrowsvar.down[0] : arrowsvar.right[0]) + '" style="border:0;" alt="" />'
			)
			jQuerycurobj.hover(
				function(e){
					var jQuerytargetul=jQuery(this).children("ul:eq(0)")
					this._offsets={left:jQuery(this).offset().left, top:jQuery(this).offset().top}
					var menuleft=this.istopheader? 0 : this._dimensions.w
					menuleft=(this._offsets.left+menuleft+this._dimensions.subulw>jQuery(window).width())? (this.istopheader? -this._dimensions.subulw+this._dimensions.w : -this._dimensions.w) : menuleft
					if (jQuerytargetul.queue().length<=1) //if 1 or less queued animations
						jQuerytargetul.css({left:menuleft+"px", width:this._dimensions.subulw+'px'}).slideDown(jqueryslidemenu.animateduration.over)
				},
				function(e){
					var jQuerytargetul=jQuery(this).children("ul:eq(0)")
					jQuerytargetul.slideUp(jqueryslidemenu.animateduration.out)
				}
			) //end hover
		}) //end jQueryheaders.each()
		jQuerymainmenu.find("ul").css({display:'none', visibility:'visible'})
	}) //end document.ready
}
}

//build menu with ID="topnav" on page:
jqueryslidemenu.buildmenu("topnav", arrowimages)