function popWin(thisID) {

var windowprops = "location=no,scrollbars=yes,menubar=no,toolbar=no,resizable=no" + ",left=100,top=0" + ",width=" + 750 + ";";
// change the top and left values to adjust window position

var title = "";
var link = "update.php?id=" + thisID;

a = window.open(link,title,windowprops);

}