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function searchReg(keyWord){
var str = "@xinlang|新浪|1@souhu|搜狐|2@wangyi|网易|3@baidu|百度|4@tengxun|腾讯|5@kaixinwang|开心网|6@renrenwang|人人网|7@1haodian|1号店|8@";
var reg = new RegExp("[^@]*" + keyWord + "[^@]*","gi");
var arr= [];
str = str.replace(reg, function(a){
arr.push(a);
});
console.log(arr);
}
searchReg("x")
<!doctype html>
<html>
<head>
<title>tank fighting</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<input id="inputbox" type="text" value="" />
<input id="btn" type="button" value="search" />
<script>
var str = "0@xinlang|新浪|1@souhu|搜狐|2@wangyi|网易|3@baidu|百度|4@tengxun|腾讯|5@kaixinwang|开心网|6@renrenwang|人人网|7@1haodian|1号店|8@";
document.getElementById('btn').onclick = function(){
var val = document.getElementById('inputbox').value,
reg = new RegExp("(\\w)*@(?:\\w+\\|)?"+val),
ret = reg.exec(str);
alert(ret[1]);
}
</script>
</body>
</html>