function popUp(URL,w_w,w_h) {      // take three varible the url + size
day = new Date();
id = day.getTime();
//w_w = 600;
//w_h = 600;
w_l = ( screen.width  - w_w ) / 2; // center of the secreen width
w_t = ( screen.height - w_h ) / 2; // center of the screen height
win = eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,left=" + w_l + ",top=" + w_t + ",width=" + w_w + ",height=" + w_h + "');");
//win.style.borders="0";
}
///////////////////////////////////////////
///<a href="javascript:popUp('URL',w_w, w_h)" class="sublink">POP</a>
///////////////////////////////////////////