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

// open hidden layer
function mopen(nav_id, drop_id)
{	
	// cancel close timer
	mcancelclosetime();

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

	// get new layer and show it
	ddmenuitem = document.getElementById(drop_id);

	if(nvmenuitem) {
		childObj = nvmenuitem.getElementsByTagName('img')[0];
		childId = childObj.getAttribute('id');
		childObj.src = "../common/pic/"+childId+".jpg";
	}

	nvmenuitem = document.getElementById(nav_id);

	childObj = nvmenuitem.getElementsByTagName('img')[0];
	childId = childObj.getAttribute('id');
	childObj.src = "../common/pic/"+childId+"_on.jpg";

	xPos = nvmenuitem.offsetParent.offsetLeft + nvmenuitem.offsetLeft;
	yPos = nvmenuitem.offsetParent.offsetTop + nvmenuitem.offsetParent.offsetHeight;
	ddmenuitem.style.left = xPos + 'px';
	ddmenuitem.style.top = yPos + 'px';

	ddmenuitem.style.visibility = 'visible';

}
// close showed layer
function mclose()
{
	childObj = nvmenuitem.getElementsByTagName('img')[0];
	childId = childObj.getAttribute('id');
	childObj.src = "../common/pic/"+childId+".jpg";

	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 dbg(info) {
	//info = document.getElementById('debuginfo');
	document.all.debuginfo.innerText = info;
	
}




function updateImage(Image) {
	control = document.getElementById('FullImage');
	control.src = Image;
}