function winpopcent(sURL, sName, iWidth, iHeight) {

	var fTopPosition = (screen.width)? (screen.width - iWidth) * 0.5 : 0;
	var fLeftPosition = (screen.height)? (screen.height - iHeight) * 0.5 : 0;
	var sOpts = "top=" + fTopPosition + ",left=" + fLeftPosition;
	sOpts += ",width=" + iWidth + ",height=" + iHeight;
	sOpts += ",scrollbars,toolbar,status,location,menubar,resizable";
	var oPop = window.open(sURL, sName, sOpts);
	oPop.focus();
	return false;
}


function winpop(sURL, sName, iWidth, iHeight, sScrollbars) {

	var sOpts=",width=" + iWidth + ",height=" + iHeight + ",sScrollbars=" + sScrollbars;
	sOpts += ",toolbar,status,location,menubar,resizable";
	var oPop = window.open(sURL, sName, sOpts);
	oPop.focus();
	return false;
}