var jqueryslidemenu={

animateduration: {over: 200, out: 100}, //duration of slide in/ out animation, in milliseconds

buildmenu:function(menuid){
    jQuery(document).ready(function($){
        var $mainmenu=$("#"+menuid+">ul")
        var $headers=$mainmenu.find("ul").parent()
        $headers.each(function(i){
            var $curobj=$(this)
            var $subul=$(this).find('ul:eq(0)')
            this._dimensions={w:this.offsetWidth, h:this.offsetHeight, subulw:$subul.outerWidth(), subulh:$subul.outerHeight()}
            this.istopheader=$curobj.parents("ul").length==1? true : false
            $subul.css({top:this.istopheader? this._dimensions.h+"px" : 0})

            $curobj.hover(
                function(e){
                    var $targetul=$(this).children("ul:eq(0)")
                    this._offsets={left:$(this).offset().left, top:$(this).offset().top}
                    var menuleft=this.istopheader? 0 : this._dimensions.w
                    menuleft=(this._offsets.left+menuleft+this._dimensions.subulw>$(window).width())? (this.istopheader? -this._dimensions.subulw+this._dimensions.w : -this._dimensions.w) : menuleft
                    if ($targetul.queue().length<=1) //if 1 or less queued animations
                        $targetul.css({left:menuleft+"px", width:this._dimensions.subulw+'px'}).slideDown(jqueryslidemenu.animateduration.over)
                },
                function(e){
                    var $targetul=$(this).children("ul:eq(0)")
                    $targetul.slideUp(jqueryslidemenu.animateduration.out)
                }
            ) //end hover
        }) //end $headers.each()
        $mainmenu.find("ul").css({display:'none', visibility:'visible'})
    }) //end document.ready
}
}

//build menu with ID="slidemenu" on page:
jqueryslidemenu.buildmenu("slidemenu")