[Solved] What is wrong with this JavaScript in my html file? [closed]

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Uncaught SyntaxError: Unexpected token ; means that you’ve put an extra semicolon somewhere you shouldn’t have.

In this case, you have an extra semicolon after your function declaration. Instead of

 function updateScript();{
            var wilson = document.getElementById("wilson");
            var willow = document.getElementById("willow");
            var mighty = document.getElementById("mighty");
            }

You should use

 function updateScript() {
            var wilson = document.getElementById("wilson");
            var willow = document.getElementById("willow");
            var mighty = document.getElementById("mighty");
            }

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solved What is wrong with this JavaScript in my html file? [closed]