function validate(f){
     window.name='windowOpener';
     myOpenWindow(); 
     buttonClicked=true; 
}

function myOpenWindow() {
     myWindowHandle = openpage('http://www.postcoderwebsoap.co.uk/Nearest/NearestGoogleMap.aspx','myWindowName',500,250); 
}

function openpage(page,name,pw,ph)
{
     if (document.all||document.getElementById||document.layers){
          var width = screen.width;
          var height = screen.height;
          var xleft = ((width/2)-(pw/2));
          var ytop = ((height/2)-(ph/2));
     }
     else{
          xleft = 500;
          ytop = 250;
     }

page = page+"?nearestUsername=" + document.nearestlookup.nearestUsername.value + "&nearestCSS=" + document.nearestlookup.nearestCSS.value + "&nearestIntro=" + document.nearestlookup.nearestIntro.value + "&nearestTitleImage=" + document.nearestlookup.nearestTitleImage.value + "&nearestListID=" + document.nearestlookup.nearestListID.value + "&nearestPostCode=" + document.nearestlookup.nearestPostCode.value;
     
	 var newpage = window.open(page,name,"height="+ph+",width="+pw+",screenX="+xleft+",left="+xleft+",screenY="+ytop+",top="+ytop+",directories=no,location=no,menubar=no,resizable=no,scrollbars=no,toolbar=no,status=no,maximize=yes",false);
     newpage.focus();
}