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 toggle(id) {
	var state = document.getElementById(id).style.display;
	if (state == 'block') {
				document.getElementById(id).style.display = 'none';
	} else {
				document.getElementById(id).style.display = 'block';
	}
}

function setIframeSRC(local_src)
{
	var url = 'http://www.sis.bg/files/file/overview/'+local_src+'#view=fith';
	// alert(url);
	document.getElementById('myIFRAME').src = url;
}