var winPopup = null;

function openWin(width, height, url) {

	var h = height;	
	var w = width;

	var x = (window.screenX) ? window.screenX : (window.left) ? window.left : 100;
	var y = (window.screenY) ? window.screenY : (window.top) ? window.top : 50;

	if (winPopup && winPopup.open && !winPopup.closed) {
		winPopup.focus();
		winPopup = window.open(url,'popup');

	} else {
		strOptions = "toolbars=0,directories=0,scrollbars=1,location=0,";
		strOptions += "width="+w+",";
		strOptions += "innerWidth="+w+",";
		strOptions += "height="+h+",";
		strOptions += "innerHeight="+h+",";
		strOptions += "screenX="+x+",";
		strOptions += "left="+x+",";
		strOptions += "screenY="+y+",";
		strOptions += "top="+y;
		winPopup = window.open(url,'popup',strOptions);
	}

	return false;
}