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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 any one can help me..
Posted 22-Dec-12 23:08pm
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Solution 1


In your HTML code, add this:
<script type="text/javascript" src="yourJavascriptFile.js"></script>
Now, your external JavaScript is loaded, and you can call your function.

Hope this helps.
Member 9511889 23-Dec-12 5:06am
after this step,how to apply validation of function to textbox.
ProgramFOX 23-Dec-12 8:21am
Then, you can call your JavaScript function in your external file in your HTML file:

<script type="text/javascript">
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Solution 2

>> First of all load the js file like

<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

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

>> Now in your submit button write...
<asp:Button ID="btnSave" runat="server" CssClass="ActionButton" Text="Save" ValidationGroup="vgAddress"
               OnClick="btnSave_Click" OnClientClick="javascript:return Validate();" 
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Solution 3

Try adding this function

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

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