function OpenWindow(dove,wid,hei,centered) {
	var options = "toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1";
	options += ",width=" + wid + ",height=" + hei;
	if (centered == 1) {
		if (screen) {
			var bottom = screen.availHeight;
			var right = screen.availWidth;
			var pos_x = parseInt((right- wid)/2) ;
			var pos_y = parseInt((bottom - hei)/2);
			options += (',left=' + pos_x + ',top=' + pos_y);
		}
	}
	else {
		options += (",left=0,top=0");
	}
	window.open(dove, '', options);
}