ASP.net Dropdown Help

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I have a drop down in my aspx page

I want to trigger an event on it so that if its selected index is 0 then it shows a textbox

I want to do this through JavaScript

C#

function do_Post(){
if(document.form1.dropdown.value!=0)
{
document.form1.submit();
}
}

How can i do this in aspx using JS??

what should i use instead of document.form1.dropdown? document.getElementbyID?? and how can i call it on aspx file??

Posted 21-Jun-11 3:44am

Syed Salman Raza Zaidi

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fjdiewornncalwe · Answer 1 · 2011-06-21T03:55:00

Solution 1

This article by Chris has a very simple and clear answer on how to do this.

Using JavaScript to handle drop-down list selections[^]

Posted 21-Jun-11 3:55am

fjdiewornncalwe

Comments

Abhinav S 21-Jun-11 10:03am

Yup. My 5.

Monjurul Habib 21-Jun-11 16:39pm

nice link , my 5.

^That's **Aragon** · Answer 2 · 2011-06-21T04:03:00

Solution 2

Example 1[^]

Example 2[^]

Posted 21-Jun-11 4:03am

^That's Aragon

Comments

Syed Salman Raza Zaidi 21-Jun-11 15:25pm

But i am using Server Control DropDownList

^That's Aragon 27-Jun-11 2:48am

You can use the same code for server control also. Only difference is that you have to find it by ClientID. i.e. document.getElementById('<%= YourddlId.ClientID%>')

Monjurul Habib · Answer 3 · 2011-06-21T09:46:00

Solution 3

http://msdn.microsoft.com/en-us/library/aa479302.aspx[^]

Posted 21-Jun-11 9:46am

Monjurul Habib