Last-Minute Checking Before Form Submission : Form HTML : Form Control JAVASCRIPT DHTML TUTORIALS

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Last-Minute Checking Before Form Submission




<HTML>
<HEAD>
<TITLE>Validator</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function checkForm(form) {
    for (var i = 0; i < form.elements.length; i++) {
        if (form.elements[i].value == "") {
            alert("Fill out ALL fields.");
            return false;
        }    
    }
    return true;
}
</SCRIPT>
</HEAD>
<BODY>
<FORM onSubmit="return checkForm(this)">
Please enter all requested information:<BR>
First Name:<INPUT TYPE="text" NAME="firstName"><BR>
Last Name:<INPUT TYPE="text" NAME="lastName"><BR>
Rank:<INPUT TYPE="text" NAME="rank"><BR>
Serial Number:<INPUT TYPE="text" NAME="serialNumber"><BR>
<INPUT TYPE="submit">
</FORM>
</BODY>
</HTML>