js实现百度搜索提示框

效果如下所示

话不多说，请看代码：

<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>百度搜索提示框</title>
<style>
* { margin: 0;padding: 0; outline: none;}
.search101 {
 width: 650px;
 margin: 300px auto;
 font-size: 0;
}
.sou1 {
 width: 514px;
 height: 40px;
 color: #666;
 font: 16px Microsoft YaHei;
 border: 1px solid rgba(170,170,170,.9);
 border-right: 0;
 border-radius: 2px 0 0 2px;
 background: rgba(255,255,255,.9);
 padding: 0 30px 0 3px;
 vertical-align: top;
 display: inline-block;
 transition: .2s;
}
.sou2 {
 width: 100px;
 height: 42px;
 font: 16px Microsoft YaHei;
 color: rgba(255,255,255,.9);
 background: rgba(0,170,240,1);
 border: 0;
 border-left: 1px solid rgba(0,170,240,1);
 border-radius: 0 2px 2px 0;
 margin: 0 0 0 -1px;
 vertical-align: top;
 transition: .3s;
 display: inline-block;
 cursor: pointer;
}
.sou2:hover {
 background: rgba(0,140,220,.9);
}
.sou1:focus {
 color: #333;
 border: 1px solid rgba(0,170,240,1);
 border-right: none;
}
</style>
</head>
<body>
 <div class="search101">
 <form action="http://www.baidu.com/baidu" class="search-form" method="" id="search-form">
  <input id="ipt1" name="tn" type="hidden" value="baidu" >
  <input type="text" id="sou1" class="sou1" name="word" maxlength="8048" value="" placeholder="" baiduSug=1 onmouseover="focus()">
  <input type="submit" class="sou2" value="百度一下" >
 </form>
 </div>
<!-- 百度搜索提示 -->
<script charset="gbk" src="http://www.baidu.com/js/opensug.js"></script> <!-- we124.com/libs/js/opensug.js(无logo) -->
<script>
 document.getElementById("sou1").focus();
 var txtObj = document.getElementById("alertSpan");
 //回调函数，用于获取用户当前选择的文字
 function show(str){
 txtObj.innerHTML = str;
 }
 var params = {
 "XOffset": 0,   //提示框位置横向偏移量,单位px
 "YOffset": 0,   //提示框位置纵向偏移量,单位px
 "width": 204,   //提示框宽度，单位px
 "fontColor": "#666",  //提示框文字颜色
 "fontColorHI": "#222",  //提示框高亮选择时文字颜色
 "fontSize": "16px",  //文字大小
 "fontFamily": "微软雅黑", //文字字体
 "borderColor": "#d8d8d8", //提示框的边框颜色
 "bgcolorHI": "#e8e8e8",  //提示框高亮选择的颜色
 "sugSubmit": true,  //在选择提示词条是是否提交表单
 };
 BaiduSuggestion.bind("ipt1",params,show);
</script>
</body>
</html> 

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