function validate(iB) {
re=/^[0-9a-zA-Z ]*$/;
if(!re.exec(iB.value)) {
alert("Please only enter letters or numbers.");
iB.value=iB.value.substring(0, iB.value.length - 1);
iB.focus();
return false;
}
return true;
}
function doDvla()
{
if (document.getElementById("regNo").value.length < 3)
{
alert("Please enter at least 3 letters.");
return false;
}
else
{
document.getElementById("hbxdvla").src="http://www.autotrader.co.uk/i/common/spacer.gif?CMP=OTC-3BL507853615&rn=" + Math.random() * new Date().getMilliseconds();
width = .75 * screen.availWidth;
if (width > 750)
{
width=750;
}
height = .75 * screen.availHeight;
if (height > 500)
{
height=500;
}
scrY = screen.availWidth - width;
scrX = (screen.availHeight - height) /2;
var features =
',directories=1'+
',location=1'   +
',menubar=1'   +
',scrollbars=1'+
',status=1'   +
',toolbar=1'   +
',resizable=1' +
',outerwidth=' + width +
',outerheight=' + height +
',width=' + width +
',height=' + height +
',screenX=' + scrX +
',screenY=' + scrY +
',top=' + scrX +
',left=' + scrY;

url= "http://www.autotrader.co.uk/CARS/common/dvla_jump_page.jsp?source=dvla-pers-reg&string=" + document.dvlaReg.reg.value;
wind=window.open (url, "dvlaReg", features);
wind.focus();
}
}