<html><body><p>搜索字符<br>"LO"<br>在短语中：<br>"HELLO, LOOK AT YOU!"<br>并返回它出现的第一个位置，但不在单词的<strong>结尾</strong></p><p>找到位置：<span id="demo"></span></p><script>var str = "HELLO, LOOK AT YOU!"; var patt1 = /LO\B/;var result = str.search(patt1);document.getElementById("demo").innerHTML = result;</script></body></html>