function checkDirectionsform() {
if(document.getElementById('dForm').saddr.value=="")
{
alert("Please enter the post code");
document.getElementById('dForm').saddr.focus();
return;
}
qurl="http://maps.google.com/maps?daddr=NN17+2AE&saddr=" + document.getElementById('dForm').saddr.value;
window.open(qurl);
}