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JS实现输入框智能提示

小云云原创: 2018-03-22 16:56:242143浏览
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(&#39;txt&#39;).onchange();
        }, 500);
        onload = function () {
            document.getElementById(&#39;txt&#39;).onchange = function () {
                if (document.getElementById(&#39;dv&#39;)) {
                    document.body.removeChild(document.getElementById(&#39;dv&#39;));
                }
                if (keyWords[this.value]){
                    var dvObj = document.createElement(&#39;p&#39;);
                    dvObj.id = &#39;dv&#39;;
                    dvObj.style.width = &#39;300px&#39;;
                    dvObj.style.height = &#39;200px&#39;;
                    dvObj.style.border = &#39;1px solid green&#39;;
                    dvObj.style.position = &#39;absolute&#39;;
                    dvObj.style.left = this.offsetLeft + &#39;px&#39;;
                    dvObj.style.top = this.offsetTop + this.offsetHeight + &#39;px&#39;;


                    ulObj = document.createElement(&#39;ul&#39;);
                    ulObj.style.listStyleType = &#39;none&#39;;
                    ulObj.style.margin = &#39;0&#39;;
                    ulObj.style.padding = &#39;0&#39;;
                    for (var i = 0; i < keyWords[this.value].length; i++) {
                        //创建Li
                        var liObj = document.createElement(&#39;li&#39;);
                        liObj.innerText = keyWords[this.value][i]; //显示每一项内容
                        liObj.style.marginTop = &#39;8px&#39;;
                        liObj.style.cursor = &#39;pointer&#39;;
                        //高亮显示
                        liObj.onmouseover = function () {
                            this.style.backgroundColor = &#39;yellow&#39;;
                        };
                        liObj.onmouseout = function () {
                            this.style.backgroundColor = &#39;&#39;;
                        };
                        //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>
JS实现输入框智能提示

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