how to use javascipt function from .js file and apply to textbox.

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how to use javascipt function from .js file and i want to apply this function to textbox.

Ex:I have to do like this...

my textbox not allow numeric values.To do this I have make fuction.This function is in .js file.Now I have to use this function for textbox. I don't know javascript well.so any one can help me..

Posted 22-Dec-12 22:08pm

Member 9511889

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Ehtesam Ahmed · Answer 1 · 2012-12-23T00:42:00

Solution 3

Try adding this function

C#

function isAlphabet(elem){
    var alphaExp = /^[a-zA-Z]+$/;
    if(elem.value.match(alphaExp)){
        return true;
    }else{
        alert("Can Not Contain Number");
        elem.focus();
        return false;
    }
}

Posted 23-Dec-12 0:42am

Ehtesam Ahmed

TanvirRaihan · Answer 2 · 2012-12-23T00:11:00

>> First of all load the js file like

JavaScript

<script language="javascript" type="text/javascript" src="jsfilelocation/filename.js" />

>> Remeber to return true / false based on the condition in your validation function.
For example, in your js file, let's say there is a method called Validate() that validates the textbox. SO the function should return true / false

JavaScript

function Validate()
{
   // Validation code.
   // If numeric return true else return false;
...
}

>> Now in your submit button write...

VB

<asp:Button ID="btnSave" runat="server" CssClass="ActionButton" Text="Save" ValidationGroup="vgAddress"
               OnClick="btnSave_Click" OnClientClick="javascript:return Validate();"

Thomas Daniels · Answer 3 · 2012-12-22T22:17:00

Solution 1

Hi,

In your HTML code, add this:

HTML

<script type="text/javascript" src="yourJavascriptFile.js"></script>

Now, your external JavaScript is loaded, and you can call your function.

Hope this helps.

Posted 22-Dec-12 22:17pm

Thomas Daniels

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Member 9511889 23-Dec-12 5:06am

after this step,how to apply validation of function to textbox.

Thomas Daniels 23-Dec-12 8:21am

Then, you can call your JavaScript function in your external file in your HTML file:

<small>
<script type="text/javascript">
functionInExternalFile();
</script></small>