$(function(){

    var $el, leftPos, newWidth,
        $mainNav = $("#menu"),
		$mainNav2 = $("#menu2"),
		$mainNav3 = $("#menu3");
    
    /*
        EXAMPLE ONE
    */
    $mainNav.append("<li id='magic-line'></li>");
    
    var $magicLine = $("#magic-line");
    
    $magicLine
        .width($(".current_page_item").width())
        .css("left", $(".current_page_item a").position().left)
        .data("origLeft", $magicLine.position().left)
        .data("origWidth", $magicLine.width());
        
    $("#menu li").find("a").hover(function() {
        $el = $(this);
        leftPos = $el.position().left;
        newWidth = $el.parent().width();
        
        $magicLine.stop().animate({
            left: leftPos,
            width: newWidth
        });
    }, function() {
        $magicLine.stop().animate({
            left: $magicLine.data("origLeft"),
            width: $magicLine.data("origWidth")
        });    
    });
       /*
        EXAMPLE two
    */
    $mainNav2.append("<li id='magic-line2'></li>");
    
    var $magicLine2 = $("#magic-line2");
    
    $magicLine2
        .width($(".current_page_item2").width())
        .css("left", $(".current_page_item2 a").position().left)
        .data("origLeft", $magicLine2.position().left)
        .data("origWidth", $magicLine2.width());
        
    $("#menu2 li").find("a").hover(function() {
        $el = $(this);
        leftPos = $el.position().left;
        newWidth = $el.parent().width();
        
        $magicLine2.stop().animate({
            left: leftPos,
            width: newWidth
        });
    }, function() {
        $magicLine2.stop().animate({
            left: $magicLine2.data("origLeft"),
            width: $magicLine2.data("origWidth")
        });    
    });
        /*
        EXAMPLE three
    */
    $mainNav3.append("<li id='magic-line3'></li>");
    
    var $magicLine3 = $("#magic-line3");
    
    $magicLine3
        .width($(".current_page_item3").width())
        .css("left", $(".current_page_item3 a").position().left)
        .data("origLeft", $magicLine3.position().left)
        .data("origWidth", $magicLine3.width());
        
    $("#menu3 li").find("a").hover(function() {
        $el = $(this);
        leftPos = $el.position().left;
        newWidth = $el.parent().width();
        
        $magicLine3.stop().animate({
            left: leftPos,
            width: newWidth
        });
    }, function() {
        $magicLine3.stop().animate({
            left: $magicLine3.data("origLeft"),
            width: $magicLine3.data("origWidth")
        });    
    });
     
    
        
   
});