AVoid Postback on OnClick Event

I have a Javascript function

show()
{
alert("hello");
}

which runs on ASP Button OnClick Event.

When I click the button of alert message box showing "hello", postback occurs. Is there any way I cant开发者_如何学Python prevent this postback?

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Try:

return false;

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Yes, you can do show(); return false; in the button's onclick handler.

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onclick="show();return false;"

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it's very simple: insert aber the "Alert('msg');" a "return false;".

so:

function show()
{
alert('Hallo');
return false;
 }