JS实现输入框智能提示 | 输入框智能提示

本文主要和大家分享JS实现输入框智能提示，主要以代码的形式和大家分享，希望能帮助到大家。
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
	<meta charset="utf-8" />
    <script>
        var keyWords = {
            "传智播客": ["传智播客java视频", "传智播客.net视频", "传智播客php视频"],
            "杨忠科": ["杨忠科的视频", "杨忠科的微博", "杨忠科的邮箱"],
            "杨": ["杨利伟", "杨振宇", "杨过"],
            "杨忠": ["杨忠科", "杨忠学", "杨忠爱国"]
        };
        setInterval(function () {
            document.getElementById('txt').onchange();
        }, 500);
        onload = function () {
            document.getElementById('txt').onchange = function () {
                if (document.getElementById('dv')) {
                    document.body.removeChild(document.getElementById('dv'));
                }
                if (keyWords[this.value]){
                    var dvObj = document.createElement('p');
                    dvObj.id = 'dv';
                    dvObj.style.width = '300px';
                    dvObj.style.height = '200px';
                    dvObj.style.border = '1px solid green';
                    dvObj.style.position = 'absolute';
                    dvObj.style.left = this.offsetLeft + 'px';
                    dvObj.style.top = this.offsetTop + this.offsetHeight + 'px';


                    ulObj = document.createElement('ul');
                    ulObj.style.listStyleType = 'none';
                    ulObj.style.margin = '0';
                    ulObj.style.padding = '0';
                    for (var i = 0; i < keyWords[this.value].length; i++) {
                        //创建Li
                        var liObj = document.createElement('li');
                        liObj.innerText = keyWords[this.value][i]; //显示每一项内容
                        liObj.style.marginTop = '8px';
                        liObj.style.cursor = 'pointer';
                        //高亮显示
                        liObj.onmouseover = function () {
                            this.style.backgroundColor = 'yellow';
                        };
                        liObj.onmouseout = function () {
                            this.style.backgroundColor = '';
                        };
                        //添加到ul中
                        ulObj.appendChild(liObj);
                    }
                    //ulobj添加到层中
                    dvObj.appendChild(ulObj);
                    //层添加到body中
                    document.body.appendChild(dvObj);


                }
            }
        }
    </script>
</head>
<body>
    <input type="text"  id="txt"/>
    <input type="button" value="百度一下" />
</body>
</html>
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