function CheckIt(form) {
  if (form.make_vch.selectedIndex == 0){
		alert("Please select a Make.");
		return false;
 }
 if ((form.zip.value.length != 5) || isNaN(form.zip.value)) {
	 var sMessage = "Please correct your Zip Code.";
	 alert(sMessage);
	 return false;
 }
	
 return true;
}  

function CheckIt2(form) {
  if (form.body_type.selectedIndex == 0){
		alert("Please select a Body Type.");
		return false;
 }
 if ((form.zip.value.length != 5) || isNaN(form.zip.value)) {
	 var sMessage = "Please correct your Zip Code.";
	 alert(sMessage);
	 return false;
 }
	
 return true;
}  

function CheckIt3(form) {
  if (form.body_type.selectedIndex == 0 && form.make_vch.selectedIndex == 0){
		alert("Please select a Make or Body Type.");
		return false;
 }
 if ((form.zip.value.length != 5) || isNaN(form.zip.value)) {
	 var sMessage = "Please correct your Zip Code.";
	 alert(sMessage);
	 return false;
 }
	
 return true;
}