Validate an field with a maximum number of characters : Validation « Form Control « JavaScript DHTML

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JavaScript DHTML » Form Control » Validation

Validate an field with a maximum number of characters






<html>



<head>

<script type="text/javascript">

function validate(){

    x=document.myForm

    input=x.myInput.value

    if (input.length>5){

        alert("The field cannot contain more than 5 characters!")

        return false

    }else {

        return true

    }

}

</script>

</head>



<body>

<form name="myForm" action="http://www.java2java.com" onsubmit="return validate()">

Enter some text (less than 5 characters):

<input type="text" name="myInput" size="20">

<input type="submit" value="Submit">

</form>

</body>



</html>

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14.	Only characters are allowed
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19.	Not stop when the first failed validation is encountered
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23.	Shows the usage of callback functions for checking a field
24.	Javascript validation framework
25.	Form validator library

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