Last-Minute Checking Before Form Submission : Form Submit « Form Control « JavaScript DHTML

Last-Minute Checking Before Form Submission


<script type="text/javascript"> 
function checkForm(form) { 
    for (var i = 0; i < form.elements.length; i++) { 
        if (form.elements[i].type == "text" && form.elements[i].value == "") { 
            document.write("Fill out ALL fields."); 
            return false; 
    return true; 
<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"> 


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