function play_popup(openstring) {
	//strict variables
	var width = 320;
	var height = 400;
	
	indenttop = (screen.height - height) / 2;
    indentleft = (screen.width - width) / 2;

											
    var popwin = window.open(openstring,"uniplayer","width=" + width + ",height=" + height + ",top=" + indenttop + ",left=" + indentleft + ",scrollbars=no, menubar=no, toolbar=no, resizable=no, status=no, titlebar=no");
    popwin.focus();

}