function validateFields() {

	if (document.testForm.name.value == "") {
		alert("Please enter your Name");
		return false;
	} 
	if (document.testForm.phone.value == "") {
		alert("Please enter your Phone Number");
		return false;
	} 
	if (document.testForm.email.value == "") {
		alert("Please enter your Email");
		return false;
	} 		
	
	return true;
}


<!--
ns4 = document.layers
ie4 = document.all 
nn6 = document.getElementById && !document.all 

function hideObject() {
   if (ns4) {
      document.n1.visibility = "hide";
   }
   else if (ie4) {
      document.all['n1'].style.visibility = "hidden";
   }
   else if (nn6) {
      document.getElementById('n1').style.visibility = "hidden";
   }
}

// Show/Hide functions for pointer objects

function showObject(id) {
   if (ns4) {
      document.n1.visibility = "show";
   }
   else if (ie4) {
      document.all['n1'].style.visibility = "visible";
   }
   else if (nn6) {
      document.getElementById('n1').style.visibility = "visible";
   }
}

//-->