How to block alert box through jQuery

I want to block alert box if it is present in code. Im using an api that tells me the search result of my website and if any user enter

开发者_运维问答<script>alert('Just teasing')</script>

then it shows an alert box on my page how can i stop this alert?

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First of all you should sanitize you input as @Nikita commented. If you want to accept JavaScript and only disable alert you can replace the window.alert function.

window.alert = function() { /* do nothing here */ }

Now calling alert won't do anything.

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When presenting the search results back to the user you need to ensure you HTML encode the output so the user would see the script rather than it being executed.