function popUp(URL, myheight) {
day = new Date();
id = day.getTime();
if(myheight == null) myheight=345;
mytop = 600.5-myheight;
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=1,width=539,height=" + myheight + ",left = 306.5,top = " + mytop + "');"
); }