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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> <script> function displayResult(){ document.getElementById("b1").style.position="absolute"; document.getElementById("b1").style.top="100px"; document.getElementById("b1").style.left="100px"; } </script> </head> <body> <p>这是一个段落。</p> <p>这是一个段落。</p> <p>这是一个段落。</p> <p>这是一个段落。</p> <input type="button" id="b1" onclick="displayResult()" value="定位我"> </body> </html>