The string Object

This article explains about JavaScript 'String 'object


<html>

<head>

<script>

 function f()

{
   v =document.getElementById('txt');

   alert(v.value.length);

}


</script>

</head>

<body>

Enter Text and click on button to get lengh:<BR>

<input  type ="text" id ="txt">

<input type ="button" value ="Click" onclick ="return f();" >

</body>

</HTML>

The output is self explanatory. It takes the input string and calculates the lengh.

The main purpose of length validation in real time is used in following cases.

To check length of password field, minimum as 7 characters maximum 25

To check Userid length id the length is not in the specified range and fire validation message

To force user to enter in textboxes when it's a mandatory field or any other fields length checking

Next Chapter: The Date Object

Previous Chapter: The JavaScript String object

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