Checking value

[Karl Ranville]

Hi,

I got a RadTextBox and after user enter some value and move to the next textbox, I want to check if the value is greater than 18. And if the condition fails, display an alert and clear text.

Thanks,
Karl.

[Princy]

Hi Karl,

Please have a look into the following code.

ASPX:

<telerik:RadTextBox ID="RadTextBox1" runat="server">
    <ClientEvents OnBlur="OnBlur" />
</telerik:RadTextBox>

JavaScript:

<script type="text/javascript">
    function OnBlur(sender, args) {
        var value = parseInt(sender.get_value());
        if (value < 18) {
            alert("Invalid Value");
            sender.clear();
        }
    }
</script>

I have one suggestion, you may better use the RadNumericTextBox because if you are entering some alphabets or invalid characters, then the JavaScript wont work.

Thanks,
Princy.

[Karl Ranville]

Thanks princy. As you told, the JS does not work for invalid entries. I am thinking of using RadNumericTextbox.

[moegal]

you could first test value for isNaN