alert on wrong data type

rafiki · 09-01-2006, 12:45 AM

need an alert to pop up when some1 try's to input somthin other than a number into my form so if they try type a into age it will alert then that i want numerical input

_Aerospace_Eng_ · 09-01-2006, 01:56 AM

Code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Untitled Document</title>
<script type="text/javascript">
function isNum()
{
	var thetest = document.forms[0].nums;
	thetest.setAttribute('autocomplete','off');
	if(!thetest.value.match(/^\d+$/))
	{
		alert('You can only enter numbers');
		thetest.value = '';
		thetest.focus();
	}
}
</script>
</head>

<body>
<form action="#" method="post">
<input type="text" name="nums" onKeyUp="isNum()" size="3" maxlength="3">
</form>
</body>
</html>

rafiki · 09-01-2006, 12:51 PM

aero that not working do i need 2 edit anything?

_Aerospace_Eng_ · 09-01-2006, 06:09 PM

Post the code you are using and I'll let you know. You do need to change var thetest to match your input name. In the code I posted the input name is nums. Please try using proper English and complete sentences.