$(document).ready( function()
{
   ROLL.rollover.init();
});

ROLL = {};

ROLL.rollover = 
{
   init: function()
   {
      this.preload();
      
      $(".ro").hover(
         function () { $(this).attr( 'src', ROLL.rollover.newimage($(this).attr('src')) ); }, 
         function () { $(this).attr( 'src', ROLL.rollover.oldimage($(this).attr('src')) ); }
      );
   },

   preload: function()
   {
      $(window).bind('load', function() {
         $('.ro').each( function( key, elm ) { $('<img>').attr( 'src', ROLL.rollover.newimage( $(this).attr('src') ) ); });
      });
   },
   
   newimage: function( src )
   { 
      return src.substring( 0, src.search(/(\.[a-z]+)$/) ) + '_o' + src.match(/(\.[a-z]+)$/)[0]; 
   },

   oldimage: function( src )
   { 
      return src.replace(/_o\./, '.'); 
   }
};

<!--HOVER PARA SUB MENU, AGREGADO-->


$(document).ready(function() {

	$("ul#topnav li").hover(function() { //Hover over event on list item
		$(this).css({ 'background' : ''}); //Add background color and image on hovered list item
		$(this).find("span").show(); //Show the subnav
	} , function() { //on hover out...
		$(this).css({ 'background' : 'none'}); //Ditch the background
		$(this).find("span").hide(); //Hide the subnav
	});

});










var droplinemenu={


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={h:$curobj.find('a:eq(0)').outerHeight()}
			this.istopheader=$curobj.parents("ul").length==1? true : false
			if (!this.istopheader)
				$subul.css({left:0, top:this._dimensions.h})
			var $innerheader=$curobj.children('a').eq(0)
			$innerheader=($innerheader.children().eq(0).is('span'))? $innerheader.children().eq(0) : $innerheader //if header contains inner SPAN, use that
			$innerheader.append(
				'<img src="'+ droplinemenu.arrowimage.src
				+'" class="' + droplinemenu.arrowimage.classname
				+ '" style="border:0; padding-left: '+droplinemenu.arrowimage.leftpadding+'px" />'
			)
			$curobj.hover(
				function(e){
					var $targetul=$(this).children("ul:eq(0)")
					if ($targetul.queue().length<=1) //if 1 or less queued animations
						if (this.istopheader)
							$targetul.css({left: $mainmenu.offset().left, top: $mainmenu.offset().top+this._dimensions.h})
						if (document.all && !window.XMLHttpRequest) //detect IE6 or less, fix issue with overflow
							$mainmenu.find('ul').css({overflow: (this.istopheader)? 'hidden' : 'visible'})
						$targetul.slideDown(droplinemenu.animateduration.over)
				},
				function(e){
					var $targetul=$(this).children("ul:eq(0)")
					$targetul.slideUp(droplinemenu.animateduration.out)
				}
			) //end hover
		}) //end $headers.each()
		$mainmenu.find("ul").css({display:'none', visibility:'visible', width:$mainmenu.width()})
	}) //end document.ready
}
}