// Place your application-specific JavaScript functions and classes here
// This file is automatically included by javascript_include_tag :defaults

//show overlay div block         
function showOverlay(){
    (function($){
        var div = $("#overlayDiv");   
        if(div.length == 0){
            div = $(document.createElement("div"));
            div.css("width", "100%").css("height", $(document).height()).css("background-color", "black").css("opacity", "0.8");
            div.css("position", "absolute").css("left", 0).css("top", 0);
            div.attr("z-index", "999").attr("id", "overlayDiv");
            document.body.appendChild(div[0]);
        }else{
            div.show();
        }
    })(jQuery);
}                                      

function hideOverlay(){
    (function($){
        $("#overlayDiv").hide();
    })(jQuery);
}