function getdir(obj){
var start;
start = obj.start_postcode.value;
if (start==null || start==""){
alert("Please Enter your Post-Code");
}else{
 window.open ("http://www.multimap.com/maps/?t=r#hroute=1|0|" + start + ":CT1%201TU|GB:GB");
}
return false;
}

function MM_openBrWindow(theURL,winName,features) {
  window.open(theURL,winName,features);
}