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Tryit: JAVASCRIPT
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<!DOCTYPE html> <html> <body> <p>单击该按钮可返回在字符串中找到回车符的位置。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var str = "Visit BEGTUT.\rLearn JavaScript."; var patt1 = /\r/; var result = str.search(patt1); document.getElementById("demo").innerHTML = result; } </script> </body> </html>