function popup(PAGE,HT,WT,NAME) { 
	if (!(HT)) { HT = "300"; }
	if (!(WT)) { WT = "400"; }
	if (!(NAME)) { NAME = "ExtraWindow"; }
	PopperWindow = window.open(PAGE,NAME,"location=0,menubar=0,resizable=0,scrollbars=1,status=0,titlebar=0,toolbar=0,hotkey=0,height="+HT+",width="+WT); 
}

function showhideblock(BlockName, a){
	document.getElementById(BlockName).style.display = a;
}