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

// open hidden layer
function mopen(id)
{	
	// 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.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;
	}
}
// close layer when click-out
document.onclick = mclose; 

// function too swapimages
function swapImage(imgN,imgU)
{
	if(document.images)
		{
		document.images[imgN].src=imgU;
		}
}

function getElementsByName_iefix(tag, naam) {
	var elem = document.getElementsByTagName(tag);
	var arr = new Array();
	var xx = "name";
	for(i = 0,iarr = 0; i < elem.length; i++) {
		att = elem[i].getAttribute(xx);
		if(att == naam) {
			arr[iarr] = elem[i];
			iarr++;
		}
	}
	return arr;
}