[JAVASCRIPT]

<script type="text/javascript" language="JavaScript">
function validateFormOnSubmit(theForm) {
var reason = "";

reason += validateEmpty(theForm.survey_desc);

if (reason != "") {
alert("Some fields need correction:\n" + reason);
return false;
}

return true;
}

function validateEmpty(fld) {
var error = "";

if (fld.value.length == 0) {
fld.style.background = 'Yellow';
error = "The required field has not been filled in.\n"
} else {
fld.style.background = 'White';
}
return error;
}
</script>




Formularz:

<form name="add_survey_step_1" action="test.php?step=2" method="POST" onsubmit="return validateFormOnSubmit(this)">
<textarea name="survey_desc" maxlength="250" style="width: 425px; height: 80px">
<input type="submit" name="submit_1" value="Krok 2 >>>" />
</form>