function checkifvalid(){

if (window.document.Contact.Name.value=="")
{
alert("Please Enter Your Name");
window.document.Contact.Name.focus();
return false;
}

if (window.document.Contact.Email.value=="")
{
alert("Please Enter Your Email Address");
window.document.Contact.Email.focus();
return false;
}

if (window.document.Contact.Message.value=="")
{
alert("You must enter a message, silly!");
window.document.Contact.Message.focus();
return false;
}

}