function field_name() {
if (document.sign_up.name.value=="name") {
document.sign_up.name.value="";
}
}

function field_companyname() {
if (document.sign_up.companyname.value=="company name") {
document.sign_up.companyname.value="";
}
}


function field_email() {
if (document.sign_up.email.value=="email") {
document.sign_up.email.value="";
}
}