function validateFeedback(){
  if (document.myform.tName.value==""){
    alert("Your name is required.");
    document.myform.tName.focus();
    return false;
  }
  if (document.myform.tType.value==1){
    alert("Please select inquiry type.");
    document.myform.tType.focus();
    return false;
  }   
  if (document.myform.tComments.value==""){
    alert("Your comments/inquiry is required.");
    document.myform.tComments.focus();
    return false;
  }   
  if (document.myform.tEmail.value!="") {
	   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	   var address = document.myform.tEmail.value;
	   if(reg.test(address) == false) {
		  alert('Please provide a valid email address');
		  return false;
   	   }   
  }
}