发布于 2017-01-10 21:24:24 | 390 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>关键词匹配搜索仿百度</title>
<meta name="description" content=" 内容介绍不超过100个中文">
<meta name="keywords" content=" 内容相关关键词3-5个">
<style>
body, ul, li { margin: 0; padding: 0;}
body{ font-size:12px; font-family:sumsun,arial;background:#FFFFFF;}
.gover_search{ position:relative; z-index:99; height:63px; padding:15px 0 0 20px; border:1px solid #b8cfe6; border-bottom:0; background:url(../images/gover_search_bg.gif) repeat-x 0 0;}
.gover_search_form{height:36px;}
.gover_search .search_t{ float:left; width:112px; line-height:26px; color:#666;}
.gover_search .input_search_key{ float:left; width:462px; height:18px; padding:3px; margin-right:5px; border:1px solid #ccc; line-height:18px; background:#fff;}
.gover_search .search_btn{ float:left; width:68px; height:26px; overflow:hidden; border:1px solid #ccc; text-align:center; color:#ff3300; letter-spacing:5px; background:url(../images/gover_search_bg.gif) no-repeat 0 -79px; cursor:pointer; font-weight:bold;}
.gover_search .search_suggest{ position:absolute; z-index:999; left:132px; top:41px; width:468px; border:1px solid #ccc;border-top:none; display:none;color:#004080; }
.gover_search .search_suggest li{height:24px; overflow:hidden; padding-left:3px; line-height:24px; background:#fff; cursor:default;}
.gover_search .search_suggest li.hover{background:#ddd;}
.num_right{float:right;text-align:right;line-height:24px;padding-right:10px}
</style>
</head>
<body>
<div class="gover_search">
<div class="gover_search_form clearfix">
<span class="search_t">关键词匹配搜索</span>
<input type="text" class="input_search_key" id="gover_search_key" placeholder="请输入关键词直接搜索" />
<button type="submit" class="search_btn">搜索</button>
<div class="search_suggest" id="gov_search_suggest">
<ul>
</ul>
</div>
</div>
</div>
<script type="text/javascript" src="http://jt.875.cn/js/jquery.js"></script>
<script type="text/javascript">
//实现搜索输入框的输入提示js类
function oSearchSuggest(searchFuc){
var input = $('#gover_search_key');
var suggestWrap = $('#gov_search_suggest');
var key = "";
var init = function(){
input.bind('keyup',sendKeyWord);
input.bind('blur',function(){setTimeout(hideSuggest,100);})
}
var hideSuggest = function(){
suggestWrap.hide();
}
//发送请求，根据关键字到后台查询
var sendKeyWord = function(event){
//键盘选择下拉项
if(suggestWrap.css('display')=='block'&&event.keyCode == 38||event.keyCode == 40){
var current = suggestWrap.find('li.hover');
if(event.keyCode == 38){
if(current.length>0){
var prevLi = current.removeClass('hover').prev();
if(prevLi.length>0){
prevLi.addClass('hover');
input.val(prevLi.html());
}
}else{
var last = suggestWrap.find('li:last');
last.addClass('hover');
input.val(last.html());
}
}else if(event.keyCode == 40){
if(current.length>0){
var nextLi = current.removeClass('hover').next();
if(nextLi.length>0){
nextLi.addClass('hover');
input.val(nextLi.html());
}
}else{
var first = suggestWrap.find('li:first');
first.addClass('hover');
input.val(first.html());
}
}
//输入字符
}else{
var valText = $.trim(input.val());
if(valText ==''||valText==key){
return;
}
searchFuc(valText);
key = valText;
}
}
//请求返回后，执行数据展示
this.dataDisplay = function(data){
if(data.length<=0){
suggestWrap.hide();
return;
}
//往搜索框下拉建议显示栏中添加条目并显示
var li;
var tmpFrag = document.createDocumentFragment();
suggestWrap.find('ul').html('');
for(var i=0; i<data.length; i++){
li = document.createElement('LI');
li.innerHTML = data[i];
tmpFrag.appendChild(li);
}
suggestWrap.find('ul').append(tmpFrag);
suggestWrap.show();
//为下拉选项绑定鼠标事件
suggestWrap.find('li').hover(function(){
suggestWrap.find('li').removeClass('hover');
$(this).addClass('hover');
},function(){
$(this).removeClass('hover');
}).bind('click',function(){
$(this).find("span").remove();
input.val(this.innerHTML);
suggestWrap.hide();
});
}
init();
};
//实例化输入提示的JS,参数为进行查询操作时要调用的函数名
var searchSuggest = new oSearchSuggest(sendKeyWordToBack);
//这是一个模似函数，实现向后台发送ajax查询请求，并返回一个查询结果数据，传递给前台的JS,再由前台JS来展示数据。本函数由程序员进行修改实现查询的请求
//参数为一个字符串，是搜索输入框中当前的内容
function sendKeyWordToBack(keyword){
/* var obj = {
"keyword" : keyword
};
$.ajax({
type: "POST",
url: "${ctx}/front/suqiu2/search/prompt-keyword.action",
async:false,
data: obj,
dataType: "json",
success: function(data){
//var json = eval("("+data+")");
var key=data.split(",");
var aData = [];
for(var i=0;i<key.length;i++){
//以下为根据输入返回搜索结果的模拟效果代码,实际数据由后台返回
if(key[i]!=""){
aData.push(key[i]);
}
}
//将返回的数据传递给实现搜索输入框的输入提示js类
searchSuggest.dataDisplay(aData);
}
}); */
//以下为根据输入返回搜索结果的模拟效果代码,实际数据由后台返回
var aData = [];
aData.push('<span class="num_right">约100个</span>'+keyword+'返回数据1');
aData.push('<span class="num_right">约200个</span>'+keyword+'返回数据2');
aData.push('<span class="num_right">约100个</span>'+keyword+'返回数据3');
aData.push('<span class="num_right">约50000个</span>'+keyword+'返回数据4');
aData.push('<span class="num_right">约1044个</span>'+keyword+'2012是真的');
aData.push('<span class="num_right">约100个</span>'+keyword+'2012是假的');
aData.push('<span class="num_right">约100个</span>'+keyword+'2012是真的');
aData.push('<span class="num_right">约100个</span>'+keyword+'2012是假的');
//将返回的数据传递给实现搜索输入框的输入提示js类
searchSuggest.dataDisplay(aData);
}
</script>
</body>
</html>