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.display = 'none';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.display = 'block';

}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.display = 'none';
}

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

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


function ButtonOver(im) {
   var s = new String(im.src);
   if (s.match(/_over(\.\w+)$/) == null) im.src = s.replace(/(\.\w+)$/, "_over$1");
}

function ButtonOut(im) {
   var s = new String(im.src);
   if (s.match(/_over(\.\w+)$/) != null) im.src = s.replace(/_over(\.\w+)$/, "$1");
}

function QuickJump() {
   var objSel = document.getElementById('q_jump');
   if (objSel.options[objSel.selectedIndex].value != 'none')
       location.href = objSel.options[objSel.selectedIndex].value;
}

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