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What is the difference between onclick and onclientclick in javascript?

Posted on 2013-06-30
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Last Modified: 2013-07-02
What is the difference between onclick and onclientclick in javascript?

Both seem to be executing the functions on the client side.

<img id="myimage" onclick="changeImage()" onclientclick = "ChangeTitle()"
src="pic_bulboff.gif" width="100" height="180">

Please advise.

Thanks
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Question by:Ricky66
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4 Comments
 
LVL 12

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by:duttcom
duttcom earned 150 total points
ID: 39288927
As outlined on this page - http://forums.asp.net/t/1249580.aspx

OnClick will work on server side , OnClientClick will execute on client side before control passed to server.
 
If the client side code returns TRUE then it will go to server.
 
Generally programmers use onclientclick to validate the controls like textbox,etc.
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LVL 21

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by:Dale Burrell
Dale Burrell earned 100 total points
ID: 39288928
AFAIK there is no onclientclick in javascript, it only exists in asp.net, where it gets rendered as onclick to the client i.e. in javascript?

What made you think it was a javascript event?
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Accepted Solution

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Miguel Oz earned 250 total points
ID: 39288931
This event(Onclientclick ) does not exist for pure html img
http://www.w3schools.com/tags/ref_eventattributes.asp
http://www.w3schools.com/tags/tag_img.asp
The Onclientclick  is simply ignored as it is an invalid attribute. For all practical purposes you only need onclick to implement your JS click event.

Note: Onclientclick only exists for asp.net controls like buttons to allow you execute JS scripts /methods before running the event server code.
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Author Closing Comment

by:Ricky66
ID: 39293829
Thanks!
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