change dropdownlist selected index with javascript

A

Antonio

Hi, in my page's <body tag>'s "onload" javascript event I want to call
a javascript method that will change the selected index of a drop down
list. I want it to happen every time the page gets refreshed but not
do it with codebehind, it has to be javascript.

How do I do it?
 
L

Lucas Tam

Hi, in my page's <body tag>'s "onload" javascript event I want to call
a javascript method that will change the selected index of a drop down
list. I want it to happen every time the page gets refreshed but not
do it with codebehind, it has to be javascript.

How do I do it?
Click to expand...



document.getElementById('dropdownlistname').selectedIndex = indexNumber

You can get the dropdownlist name via the .NET ClientID property of each
control.

So you'll have to dynamically output the javascript via codebehind. Take
a look at the function Page.RegisterClientScriptBlock on an example of
including dynamically written javascript.

http://msdn.microsoft.com/library/default.asp?url=/library/en-
us/cpref/html/frlrfSystemWebUIPageClassRegisterClientScriptBlockTopic.as
p
 

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