form validate.tt

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• Raw format

<script type="text/javascript">
function checkform() {
	
	/// init
	var f = document.forms['foo'];

	/// loop elements
	for(var i = 0; i < f.length; i++) {
		if(f.elements[i].name.indexOf('m')) {

			/// something is wrong
			if(/\D/.test(f.elements[i].value)) {
				alert(f.elements[i].name + ' can only take numbers');
				return false;
			}
		}
	}

	/// form is ok
	return true;
}
</script>

<h2>Validate form using js</h2>
<form name="foo" onsubmit="return checkform()">
<p>
	<input name="m_bah" value="m_bah hello">
	<br><input name="f_bah" value="f_bah hello">
	<br><input type="submit">
</p>
</form>