<html>
<body>
<p>
搜索字符<br>
"LO"
<br>在短语中单词的<strong>结尾</strong>:<br>
"HELLO, LOOK AT YOU!"
</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>