var win=null;


function NewWindow(mypage,myname,w1,h1,scroll,pos) {
mypage=mypage+'?code='+document.getElementById('postcode').value;
var w=w1;
var h=h1;
var left = (screen.width/2)-(w/2);
var top = (screen.height/2)-(h/2);
var targetWin = window.open (mypage, 'Search', 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars='+scroll+', resizable=no, copyhistory=no, width='+w+', height='+h+', top='+top+', left='+left);
}


function CloseNewWin(){if(win!=null && win.open)win.close()}
window.onfocus=CloseNewWin;