function findValue() {

if(document.forms[0].startpc.value != "" && document.forms[0].startpc.value != null){

//document.forms[0].submit();
window.open("http://www.greenflag.co.uk/routeplanning/Directions.aspx?StartPostcode="+document.forms[0].startpc.value+"&StartCountry=UK&EndPostcode="+document.forms[0].endpc.value+"&EndCountry=UK&buttonGetRoute2=Get+directions&RouteType=fastest&units=M&map_type=textonly",'DrivingDirections');
} else {
alert("Please enter the Postcode where you wish to begin your journey.");
}
return false;
}