function getDirection(postcode){
    var directionLink = "http://maps.google.co.uk/maps?daddr=SW6+3PA&geocode=&dirflg=&saddr="+postcode+"&f=d&sll=51.467884,-0.208526&sspn=0.019115,0.039911&ie=UTF8&z=&om=1"
    window.open (directionLink,"GoogleDirections");
}