javascript - HTML & JS - Add custom parameter to any request -


i have huge html+php file, , i'm not able edit fully. so, possible listen "onclick" on "onsubmit" on forms? means when user clicks on link, parameter automatically adds request. so, if http://example.com/file?param1=true should stay http://example.com/file?param1=true&customparam=value (this static parameter) , should request or post


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