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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>NewDocument</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<meta name="generator" content="Editplus" />
<meta name="author" content="" />
<meta name="keywords" content="" />
<meta name="description" content="" />
</head>
<body>
<input type="text" id="search" onkeyup="searchDate()"/>
<div id="cnt">a只是一个简单的例子,如用csdn的替换的,如将cSdn,CSdn,CSDN等 这种组合全部给增加font,但是里面的原有的字母是不能改变的</div>
<script type="text/javascript">
var cacheData = cnt.innerHTML;
var searchDate = function () {
var key = document.getElementById("search").value;
var patten = new RegExp("("+key+")","gi");
document.getElementById("cnt").innerHTML = cacheData.replace(patten,"<i style='color:red'>$1</i>");
};
</script>
</body>
</html>
var str2 = str1.replace(/北京/g, "<font style='background-color:#ffff00'>北京</font>");