function ValidateContactForm()
{
  var name = document.ContactForm.name;
   var email = document.ContactForm.email;
	var phone = document.ContactForm.phone;
	var requirements = document.ContactForm.requirements;
   				 
	if (name.value == "")
    {
        window.alert("Please enter your name.");
        name.focus();
        return false;
    }
 if (email.value == "")
    {
        window.alert("Please enter a valid e-mail address.");
        email.focus();
        return false;
    }
	
    if (email.value.indexOf("@", 0) < 0)
    {
        window.alert("Please enter a valid e-mail address.");
        email.focus();
        return false;
    }
	
    if (email.value.indexOf(".", 0) < 0)
    {
        window.alert("Please enter a valid e-mail address.");
        email.focus();
        return false;
    }
	  if ((phone.checked == false) && (phone.value == ""))
    {
        window.alert("Please enter your phone number.");
        phone.focus();
        return false;
    }

    if(phone.value.search("[^0-9 ,/+-]")!=-1)
	{
        alert("Please enter only digits in phone no");
		phone.focus();
		return false;
	}

   if(phone.value.length < 10)
	{
        alert("Please enter a valid phone no");
		phone.focus();
		return false;
	}
 if (requirements.value == "")
    {
        window.alert("Please enter your Requirements.");
        requirements.focus();
        return false;
    }
    return true;
}