var timeout	= 350;
var closetimer	= 0;
var ddmenuitem	= 0;

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

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.width = (ctrl.offsetWidth-2);
	ddmenuitem.style.visibility = 'visible';
}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

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

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

Object.prototype.getElementWidth = function() {
	if (typeof this.clip !== "undefined") {
		return this.clip.width;
	} else {
		if (this.style.pixelWidth) {
			return this.style.pixelWidth;
		} else {
			return this.offsetWidth;
		}
	}
}

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