/* 
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;
var originalmenuitem = 0;

// open hidden layer
function mopen(id)
{
	// cancel close timer
	mcancelclosetime();

        $('#'+id).fadeIn(500);
        $('#nav-courses').addClass('hover-nav-item');

}
// close showed layer
function mclose()
{
            $('#dropdown_nav').fadeOut(500);
            $('#nav-courses').removeClass('hover-nav-item');
}

// go close timer
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

// close layer when click-out
document.onclick = mclose;