function contact_valid(){
if(document.contactform.fname.value==""){
alert("Please Enter First Name");
document.contactform.fname.focus();
return false;
}
if(document.contactform.lname.value==""){
alert("Please Enter Last Name");
document.contactform.lname.focus();
return false;
}
if(document.contactform.email.value==""){
alert("Please Enter Email Address");
document.contactform.email.focus();
return false;
}
var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
var emailaddress = document.contactform.email.value;
if(reg.test(emailaddress) == false) {
    alert('Invalid Email Address');
    document.contactform.email.focus();
    return false;
}
return true;
}