function validate()  //form validation function
{
var emailExp = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*\.(\w{2}|(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum))/;
var numericExpression = /^[0-9]+$/; 
var alphaExp = /^[a-zA-Z]+$/;


    if (!document.form.phoneNumberNPX.value.match(numericExpression)||(document.form.phoneNumberNPX.value == ""))
      {
       alert("Please enter your area code for your phone number.");
       return false;
      }
      
       if (!document.form.phoneNumberNXX.value.match(numericExpression)||(document.form.phoneNumberNXX.value == ""))
      {
       alert("Please the prefix for your mobile phone number.");
       return false;
      }
        if (!document.form.phoneNumberNumber.value.match(numericExpression)||(document.form.phoneNumberNumber.value == ""))
      {
       alert("Please enter your mobile phone number.");
       return false;
      }
      
	alert("Thank you!")
	return true;

}