function validateForm(form) {

var digits="0123456789";
var temp;
cf=form.cfirst.value;
cl=form.clast.value;
l1=form.line1.value;
l2=form.line2.value;
l3=form.line3.value;
tn=form.telnum.value;


if (cf.length<1) {
alert("Please enter a first name!");
form.cfirst.value="";
return false;
}
else if (cl.length<1) {
alert("Please enter a last name!");
form.clast.value="";
return false;
}

else if ((l2.length<1 && l3.length<1) || (l1.length<1 && l2.length<1 && l3.length<1))  {
alert("Please enter a valid Street (3 lines) OR Postal (2 lines) address!");
return false;
}
else if (tn.length<6) {
alert("Telephone number must be at least 6 digits!");
form.telnum.value="";
return false;
}

return true;

}

var submitcount=0;

function reset() {
document.myform.cfirst.value="";
document.myform.clast.value="";
document.myform.line1.value="";
document.myform.line2.value="";
document.myform.line3.value="";
document.myform.telnum.value="";
document.myform.telnum2.value="";
document.myform.clast.focus();
}

function checkFields() {                       // field validation -
if (submitcount == 0)
      {
      submitcount++;
      return true;
      }
   else 
      {
      alert("This form has already been submitted.  Thanks!");
      return false;
      }
}