// specify full URL to down and right arrow images (25 is padding-right to add to top level LIs with drop downs):
var arrowimages={down:['arrowdn','js/arrow_down.png',8], right:['arrowrt','js/arrow_right.png']}

var jqmenu = {
  fadesettings: {overduration:200, outduration:200},  // duration of fade in/out animation, in milliseconds
  buildmenu:function(menuid, arrowsvar) {
    $(document).ready(function($) {
      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.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;" />'
        )
        $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
            $targetul.css({left:menuleft+"px"}).fadeIn(jqmenu.fadesettings.overduration)
          },
          function(e) {
            $(this).children("ul:eq(0)").fadeOut(jqmenu.fadesettings.outduration)
          }
        )  // end hover
      })  // end $headers.each()
      $mainmenu.find("ul").css({display:'none', visibility:'visible'})
    })  // end document.ready
  }
}

// build menu with id="jqmenu[number]" on page:
jqmenu.buildmenu("jqmenu1", arrowimages)