//mouse on/off.
jQuery(document).ready(        
    function()
    {                                
        var mouseOff = ".mouseOff";
        var mouseOn = ".mouseOn";   
        var addtobinder_area = ".ico_addtobinder";             
        var addtobinder_areahidden = ".ico_addtobinder_hidden";             
        
        //on mouse enter of a button.
        $(mouseOff).bind("mouseenter",
            function()
            {
                var element = $(this);
                element.hide();
                element.parent().find(mouseOn).show();                                
            }
        );
        
        //on mouse leave from a button.
        $(mouseOn).bind("mouseleave",
            function()
            {
                var element = $(this);
                element.hide();
                element.parent().find(mouseOff).show();                
            }
        );                                        
        
        //add to binder area (hidden).
        $(addtobinder_areahidden).bind("mouseleave",
            function()
            {
                var element = $(this);
                element.find(mouseOn).hide();
                element.parent().find(mouseOff).show();                
            }
        );
        
        //add to binder area.
        $(addtobinder_area).bind("mouseleave",
            function()
            {
                var element = $(this);
                element.find(mouseOn).hide();
                element.parent().find(mouseOff).show();                
            }
        );
    }
);