<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
h2{text-align: center;}
div{margin:0 auto;width:500px;background:burlywood;padding:30px;text-align: right;}
input{width:360px;height:20px;line-height:20px;padding:10px;}
.btn{height:40px;width:100px;}
</style>
</head>
<body>
<h2>字符串筛选</h2>
<div>
<p>示例字符串：<input type="text" id="str" name="str" value=""></p>
<p>筛选部分：<input type="text" id="st" name="st" value=""></p>
<p>筛选结果：<input type="text" id="res" name="res" value=""></p>
<input type="button" value="测试按钮" onclick="replace()" class="btn">
</div>
<script>
function replace() {
str = document.getElementById("str").value;
st = document.getElementById("st").value;
res = document.getElementById("res");
for(var i=0;i<str.length;i++){
if(str.indexOf(st)>-1){
str=str.replace(st,"");
//把特定字符串转换成空字符串
}else{
break;
//如果没有，则跳出循环
}
}
res.value=str;
}
</script>
</body>
</html>
