e/6/index.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <title>限制只能输入数字</title>
    <link rel="stylesheet" type="text/css" href="../../css/bootstrap.min.css" media="all"/>
    <link rel="stylesheet" type="text/css" href="../../css/bootstrap-theme.min.css" media="all"/>
    <link rel="stylesheet" type="text/css" href="../../css/reset.css" media="all"/>
</head>
<body>
<div class="demo1">
    <form class="form-horizontal user-input" id="form" role="form">
        <div class="form-group">
            <label for="user" class="col-sm-2 control-label">用户名</label>
            <div class="col-sm-10">
                <input type="text" class="form-control" data-ime="1" id="user" placeholder="用户名">
            </div>
        </div>
        <div class="form-group">
            <label for="password" class="col-sm-2 control-label">密码</label>
            <div class="col-sm-10">
                <input type="password" class="form-control" id="password" placeholder="密码">

            </div>
        </div>
        <div class="form-group">
            <div class="col-sm-offset-2 col-sm-10">
                <button id="btn" type="button" class="btn btn-primary btn-block">提 交</button>
            </div>
        </div>
    </form>
</div>
<script>
    (function(){
        var form = document.getElementById('form');
        var input = form.getElementsByTagName('input');
        for(var i = 0; i < input.length; i++){
            input[i].onfocus = input[i].onblur = input[i].onkeyup = function(){
                this.value = this.value.replace(/\D/g, '');
            }
        }
    }());
</script>
</body>
</html>