calling javascript in oncheckedchanged event dosenot work

Question

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Hello everybody I have JavaScript function that show and hide div. I need to call it on checkbox oncheckedchanged event but it always gives me an error here is the javascript function.

XML

<script language="javascript" type="text/javascript">
function showHideDiv(divID)
{

divstyle = document.getElementById("divID").style.visibility;
if(divstyle.toLowerCase()=="visible" || divstyle == "")
{
document.getElementById("divID").style.visibility = "hidden";

}
else
{
document.getElementById("divID").style.visibility = "visible";

}
}
</script>

and here is how I called it:

XML

<td class="style2">
                 <asp:CheckBox ID="YES" runat="server" AutoPostBack="True"
            Text="yes" oncheckedchanged="showHideDiv(divID);" />

             </td>
             <td class="style2">
               <asp:CheckBox ID="NO" runat="server"  AutoPostBack="True"
                    Text="no" oncheckedchanged="showHideDiv(divID);"/>
             </td>

and here is my div:

XML

<div id="Comments"   >
                  <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                  </div>

and I want to make it hiddden by default

and there is another question I want to uncheck check box after the other is checked i need to make it using c#, now can i call the javascript function then execute c# code
any one can help ,
thanks in advance

Posted 12-Sep-10 4:09am

eslam soliman

Updated 12-Sep-10 4:48am

Abhijit Jana

v3

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4 solutions

Solution 1

What error are you getting ?

You have to chage the below codeblock first.

XML

<asp:CheckBox ID="YES" runat="server" AutoPostBack="True"
           Text="yes" oncheckedchanged="showHideDiv(divID);" />
            </td>

You have to Pass your DIVID, Which is "Comments". It should be like

C++

oncheckedchanged="showHideDiv(Comments);"

Change the code with this and let me know if you have any other issue.

Thanks !

Posted 12-Sep-10 4:52am

Abhijit Jana

Comments

eslam soliman 12-Sep-10 11:20am

Abhijit,
i try it but it gives me that error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS1026: ) expected

Source Error:

Line 25: Line 26: Line 27: <asp:checkbox id="YES" runat="server" autopostback="True"
line="" 28:="" text="yes" oncheckedchanged="showHideDiv(Comments);">
Line 29:

eslam soliman 12-Sep-10 11:21am

it gives me the error in that line

<asp:CheckBox ID="YES" runat="server" AutoPostBack="True"

eslam soliman 12-Sep-10 11:29am

i think that runat server property make some problems or becaue i put that code inside user control iam trying to solve the problem i know that it is simple but i cant find answer

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Abhishek Sur · Accepted Answer · 2010-09-12T06:05:00

OnCheckedChanged is a Server side event. So you are not allowed to give the javascript function here.

You need to register the javascript from the server or use

input type="CheckBox" and remove runat=server totally.

<asp:CheckBox OnCheckedChanged="checkchanged" runat="server" AutoPostBack=true/>

C#

protected void checkchanged(object sender, EventArgs e)
       {
           this.ClientScript.RegisterStartupScript(this.GetType(), "registerscript", "alert('hi');", true);
       }

Hence you can see the postback produces the alert.

eslam soliman · Accepted Answer · 2010-09-12T05:53:00

thanks i solve the problem it was easy but i was not focus:
that is the code i use ,the error was not on oncheckedchanged ,i have to use on click

XML

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebUserControl1.ascx.cs" Inherits="java.WebUserControl1" %>
<style type="text/css">
    .style1
    {
        width: 100%;
    }
</style>
<script language="JavaScript" type="text/javascript">
    function toggle(id) {
        var state = document.getElementById(id).style.display;
        if (state == 'block') {
            document.getElementById(id).style.display = 'none';
        } else {
            document.getElementById(id).style.display = 'block';
        }
    }
    function hide(id) {
     var state = document.getElementById(id).style.display;
     if (state == 'block') {
         document.getElementById(id).style.display = 'none';
     }
    }
    </script>
<table class="style1">
    <tr>
        <td>
            &nbsp;</td>
        <td>
          <asp:checkbox id="no" OnClick="JavaScript:hide('Comments');" Runat="server" />
        </td>
        <td>
          <asp:checkbox id="yes" OnClick="JavaScript:toggle('Comments');" Runat="server" />
        </td>
    </tr>
    <tr>
        <td colspan="3">
                  <div id="Comments" style="display:none"  >
                  <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                  </div>
         </td>
    </tr>
</table>

AshiqueAhammed · Accepted Answer · 2010-09-13T01:06:00

Solution 4

Hey Buddy..

you can use the OnChange property ...

eg:

<asp:checkbox id="no" OnChange="hide('Comments');" Runat="server" />

Posted 13-Sep-10 1:06am

AshiqueAhammed