function checkForm(TheForm) {
// url, title, description
  
if (TheForm.Firstname.value == "")
{
alert("Please provide your first name.");
TheForm.Firstname.focus();
return false;
}
if (TheForm.Lastname.value == "")
{
alert("Please provide your last name.");
TheForm.Lastname.focus();
return false;
}
if (TheForm.Title.value == "")
{
alert("Please provide your job title.");
TheForm.Title.focus();
return false;
}
if (TheForm.Email.value == "")
{
alert("Please provide your email.");
TheForm.Email.focus();
return false;
}

var string1=TheForm.Email.value
if (string1.indexOf("@")==-1)
{
alert("Please input a valid email address!")
return false
}


if (TheForm.Phone.value == "")
{
alert("Please provide your contact phone number.");
TheForm.Phone.focus();
return false;
}
if (TheForm.Company.value == "")
{
alert("Please provide your company name.");
TheForm.Company.focus();
return false;
}
if (TheForm.Address.value == "")
{
alert("Please provide your company address.");
TheForm.Address.focus();
return false;
}
if (TheForm.City.value == "")
{
alert("Please provide the company city.");
TheForm.City.focus();
return false;
}
if (TheForm.State.selectedIndex == 0)
{
alert("Please select company state.");
TheForm.State.focus();
return false;
}
if (TheForm.Zip.value == "")
{
alert("Please provide company zipcode.");
TheForm.Zip.focus();
return false;
}
if(isNaN(TheForm.Zip.value)) 
   { 
     alert("Invalid data format.\n\nOnly numbers are allowed."); 
     TheForm.Zip.focus();
     return (false); 
   }
if (TheForm.Co_phone.value == "")
{
alert("Please provide your company phone number.");
TheForm.Co_phone.focus();
return false;
}


return true;


}// end function checkalForm