var def_width		= 590;
var def_height	= 500;

function open_sub( url , def_width , def_height ) {
	scr_w = screen.width;
	scr_h = screen.height;
	pos_w = (scr_w / 2) - (def_width / 2);
	pos_h = (scr_h / 2) - (def_height / 2);
	var wkUrl	= encodeURI( url );
	newWin = window.open(wkUrl,'subwin','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width='+def_width+',height='+def_height+',left='+pos_w+',top='+pos_h+',titlebar=no');
}