function checkForm() {

if (document.getElementById("first_name").value == ""){
hideAllErrors();
document.getElementById("fnameError").style.display = "inline";
document.getElementById("first_name").select();
document.getElementById("first_name").focus();
return false;
}
else
if (document.getElementById("last_name").value == "") {
hideAllErrors();
document.getElementById("lnameError").style.display = "inline";
document.getElementById("last_name").select();
document.getElementById("last_name").focus();
return false;
}
else
if (document.getElementById("email").value == "") {
hideAllErrors();
document.getElementById("emailError").style.display = "inline";
document.getElementById("email").select();
document.getElementById("email").focus();
return false;
}
else
if(document.forms[0].approval.checked == false)
{
hideAllErrors();
document.getElementById("approvalError").style.display = "inline";
return (false);
}
return true;
}

function hideAllErrors() {
document.getElementById("fnameError").style.display = "none"
document.getElementById("lnameError").style.display = "none"
document.getElementById("emailError").style.display = "none"
document.getElementById("approvalError").style.display = "none"
}