function popup(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=350,height=640')
}

function submitForm()
  	{
  		theForm = document.getElementById("mainform");
  		if(theForm.tandc.checked)
  		{
  			theForm.submit();
  		}
  		else
  		{
  			alert("Please confirm that you agree to the terms and conditions");
  		}
  	}