function validateForm($form)
{

if(""==document.forms.visa.passport.value)
{
alert("Please enter U.S. or Non-U.S. passport.");
return false;
}

if(""==document.forms.visa.purpose.value)
{
alert("Please enter a purpose.");
return false;
}

if(""==document.forms.visa.country.value)
{
alert("Please enter a destination country.");
return false;
}

}