Javascript mutiplying text of two textboxes

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Hey everyone,

I have this code where I am trying multiply values from a textbox and label - want to show this value on a label on OnBlur event.

XML

<script type="text/javascript">
           function FillAmount(sender, args)
           {
               var txtQuantityE = $find('<%= txtQuantityE.ClientID %>');
               var lblRate = $find('<%= lblRate.ClientID %>');
               var lblAmount = $find(txtQuantityE*lblRate).get_value();
               $find(lblAmount).set_value(lblAmount);
           }

XML

<telerik:RadNumericTextBox ID="txtQuantityE" runat="server" Skin="Office2007" EmptyMessage="Enter Quantity"
                                                        SelectionOnFocus="CaretToEnd" ToolTip="Enter Quantity to place Order" Culture="English (United States)"
                                                        Height="14px" Width="141px">
                                                        <ClientEvents OnBlur="FillAmount" />
                                                    </telerik:RadNumericTextBox>

Does not seem to work. Please help...

Thanks
Amit

Posted 19-Oct-10 1:19am

AmitChoudhary10

Updated 19-Oct-10 1:40am

Sandeep Mewara

v2

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Sandeep Mewara · Answer 1 · 2010-10-19T01:43:00

Well, assuming the Client event is raised, looks like this line is not correct:
var lblAmount = $find(txtQuantityE*lblRate).get_value();
Use DEBUGGER and you will get it easily.

It should be something like: txtQuantityE.value * lblRate.text
Verify and see. You already have your textbox and label objects, use them directly. Once done, find the amount control and assign the value.

Brij · Answer 2 · 2010-10-19T02:16:00

Solution 2

Also one more thing, To do any airtmetic opertation, first you need to change in number. So do something like this

Number(txtQuantityE.value) * Number(lblRate.text);

Please make sure the entires are number else it Number() method will return null or undefined

Posted 19-Oct-10 2:16am

Brij