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

// open hidden layer
function mopen(id,sid,hidetop,dim){	
	// cancel close timer
	mcancelclosetime();
	
	if(id == "delblog"){
		document.getElementById("blogstatus").innerHTML="";
	}
	
	if(id == "editblog"){
		document.getElementById("saveblogstatus").innerHTML="";
	}
	
	if(id == 'deeplink'){
		document.getElementById('linkfield').value = readCookie('deeplink');
	}

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

	if(hidetop){
		document.getElementById('menucover_top').style.zIndex = 0;
		document.getElementById('topmenu').style.zIndex = 0;
		document.getElementById('greybanner').style.zIndex = 0;
	}

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
	if(dim != 0) $("#dim").show();
	
	if(document.getElementById(sid)){
		sddmenuitem = document.getElementById(sid);
		sddmenuitem.className = 'activelink';
	}
}

// close showed layer
function mclose(){
	if(document.getElementById('menucover_top')) document.getElementById('menucover_top').style.zIndex = 500;
	if(document.getElementById('topmenu')) document.getElementById('topmenu').style.zIndex = 500;
	if(document.getElementById('greybanner')) document.getElementById('greybanner').style.zIndex = 500;
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	if(sddmenuitem) sddmenuitem.className = '';
	ddmenuitem.className = '';
	$("#dim").hide();
}

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

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