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JavaScript string length validation

String length validation in JavaScript is used to make sure that number of characters entered in a specified field will be restricted. For example name field should have a length of 8-10 characters only.

Example

<!DOCTYPE html>
<html lang="en">
<head>
<script> 
function stringLengthCheck(name, minlength, maxlength)
{
var mnlen = minlength;
var mxlen = maxlength;
 
if(name.value.length<mnlen || name.value.length> mxlen)
{ 
alert("Name should be " +mnlen+ " to " +mxlen+ " characters.");
return false;
}
else
{ 
return true;
}
}    
</script> 
</head>
<body>
<div class="mail">
<h2>JavaScript String Length Validation</h2>
<form name="form1" action="#"> 
Name: <input type='text' name='name'/></br></br>
<input type="submit" name="submit" value="Submit" 
onclick="stringLengthCheck(document.form1.name, 8, 10)"/>
</form>
</div>
</body>
</html>
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