//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', 'down.gif', 23],
    right: ['rightarrowclass', 'right.gif']
}

var jqueryslidemenu = {

    animateduration: {
        over: 200,
        out: 100
    }, //duration of slide in/ out animation, in milliseconds
    buildmenu: function(menuid, arrowsvar){
        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',
                opacity: 0.9
            })
        }) //end document.ready
    }
}

//build menu with ID="myslidemenu" on page:
jqueryslidemenu.buildmenu("jsmenu", arrowimages)
//jqueryslidemenu.buildmenu("footerlinks", arrowimages);

function swapImage(obj, img){
    document.getElementById(obj).src = img;
}