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源代码：
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<!DOCTYPE html> <html> <head> <script> function myfunction(txt) { alert(txt); } </script> </head> <body> <form> <input type="button" onclick="myfunction('Good Morning!')" value="In the Morning"> <input type="button" onclick="myfunction('Good Evening!')" value="In the Evening"> </form> <p> When you click on one of the buttons, a function will be called. The function will alert the argument that is passed to it. </p> </body> </html>
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