var win = null;
function NewWindow(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
win = window.open(mypage,myname,settings)
}

function arata(elmnt){
	document.getElementById(elmnt).style.display = "block";
	document.getElementById(elmnt).style.visibility = "visible";
	}
function ascunde(elmnt){
	document.getElementById(elmnt).style.display = "none";
	document.getElementById(elmnt).style.visibility = "hidden";
}