keyword.js的代码如下:

<div class="jb51code">
<pre class="brush:js;">
$(document).ready(function(){
/--------------------搜索框样式控制js------------------------/
var checktype=$("#search_bg #button_bg .changetype");
var type=$("#search_bg #button_bg .seach_type .type");
var seach_type=$("#search_bg #button_bg .seach_type");
var form=$("#search_bg #button_bg form");
var textb=$("#search_bg #button_bg form .textb");
var subb=$("#search_bg #button_bg form .subb");
var tbcolor="#126AC1";
textb.focus();//文档加载完毕 搜索框获取焦点
var search_types={
"types":[{name:"wd",action:"./search.PHP",value:"搜索本站",subcolor:"#126AC1",stype:"./images/sanjiao_03.png"},{name:"wd",action:"http://www.baidu.com/s",value:"百度一下",{name:"q",action:"http://www.so.com/s",value:"360搜索",subcolor:"#53C920",stype:"./images/sanjiao_04.png"},{name:"w",action:"http://www.soso.com/q",value:"腾讯搜索",subcolor:"#760AAA",stype:"./images/sanjiao_05.png"},{name:"query",action:"http://www.xuan369.com/so/qqkk8.jsp",value:"搜狗搜索",subcolor:"#F94F1B",stype:"./images/sanjiao_06.png"},action:"http://209.85.228.42/search",value:"谷歌搜索",subcolor:"#29C971",stype:"./images/sanjiao_07.png"}
]};
//alert(search_types.types[1].value);
//选择搜索类型按钮被点击
checktype.click(function(){
seach_type.css({"display":"block",height:0});
seach_type.animate({
height:(type.height()+1)*type.length,},500);

});

type.click(function(){
//alert(search_types.types[$(this).index()].value)
form.attr("action",search_types.types[$(this).index()].action);//改变表单提交位置
textb.attr("name",search_types.types[$(this).index()].name);//改变表单变量名
subb.val(search_types.types[$(this).index()].value);//改变按钮显示
subb.css({background:search_types.types[$(this).index()].subcolor});//改变按钮颜色
tbcolor=search_types.types[$(this).index()].subcolor;//改变输入框边框颜色
checktype.css({"background":"url("+search_types.types[$(this).index()].stype+")"});
subb.css({"Box-shadow":"0 1px 2px "+search_types.types[$(this).index()].subcolor});
textb.focus();//编辑框获取焦点
seach_type.animate({
height:0,500,function(){
seach_type.css({"display":"none",height:0});
});
});

seach_type.mouseleave(function(){
seach_type.animate({
height:0,height:0});
});
});
textb.focus(function(){
textb.css({border:"solid 1px "+tbcolor});
//
seach_type.animate({
height:0,height:0});
});
});
textb.blur(function(){
textb.css({border:"solid 1px "+"#CCCCCC"});
});
/-----------------获取关键词js---------------------/
var textb=$("#search_bg #button_bg form .textb");
textb.keyup(function(event){
if(textb.val()==""||textb.val()==" "){
return;
}
if(event.which!=39&&event.which!=40&&event.which!=37&&event.which!=38&&event.which!=13)
$.ajax({
url:"http://suggestion.baidu.com/su",type:"GET",dataType:"jsonp",jsonp: 'jsoncallback',async: false,timeout: 5000,//请求超时
data:{
"wd":textb.val(),"cb":"keydata"
},success: function (json) {
},error: function (xhr) {
return;
}

});
});

});
//打印关键词
function keydata(keys){
var len=keys.s.length;
var keywordBox=$("#search_bg #button_bg .keyword");//关键词盒子
var textb=$("#search_bg #button_bg form .textb");
var subb=$("#search_bg #button_bg form .subb");
if(len==0){
keywordBox.css({display:"none"});
}else{
keywordBox.css({display:"block"});
}
var spans="";
for(var i=0;i<len;i++)
{
spans+=""+keys.s[i]+""
}
keywordBox.html(spans);//把关键词写入关键词盒子
keywordBox.animate({
height:(keywordBox.children().height()+1)*len//关键词下滑效果
},100);
//点击候选词汇
keywordBox.children().click(function(){
textb.val($(this).html());//选中词汇放入输入框

keywordBox.animate({
height:0//关键盒子收缩效果
},10,function(){
keywordBox.css({display:"none",height:"auto"});
keywordBox.empty();//清空盒子内容
});

textb.focus();//输入框获取焦点*/
$("#search_bg #button_bg form").submit();//提交搜索
});

//提交按钮获取焦点后
subb.focus(function(){//提交按钮获取焦点后
keywordBox.animate({
height:0//关键盒子收缩效果
},height:"auto"});
keywordBox.empty();//清空盒子内容
});
});

/textb.blur(function(){//输入框失去焦点后收缩关键词盒子(此方法会与点击候选词方法冲突造成失效)
keywordBox.animate({
height:0//关键盒子收缩效果
},100,height:"auto"});
keywordBox.empty();//清空盒子内容
});
});/
keywordBox.mouseleave(function(){//鼠标离开关键字盒子后收缩关键词盒子（取代上一个方法）
keywordBox.animate({
height:0//关键盒子收缩效果
},height:"auto"});
keywordBox.empty();//清空盒子内容
});
});
var numspan=0;//用来指定选择候选词（通过方向键改变）
textb.keydown(function(event){//如果使用回车提交时，关键词盒子也可以自动收缩
if(event.which==13){
keywordBox.animate({
height:0//关键盒子收缩效果
},function(){
keywordBox.css({display:"none",height:"auto"});
keywordBox.empty();//清空盒子内容
});
/$("#search_bg #button_bg form").submit(function(){
return false;//阻止提交
});/
/$("#search_bg #button_bg form").submit(function(e){
e.preventDefault();//阻止提交方法2
});/
}
//按下下方向键
if(event.which==40){

if(numspan==len)
 numspan=0;
for(var i=0;i<len;i++){
 if(numspan==i){
  keyword<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.children().eq(i).css({
   "background-color":"rgba(0,0.3)"
  });
 }else{
  keyword<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.children().eq(i).css({
   "background-color":"rgba(255,0.3)"
  });
 }
}
textb.val(keyword<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.children().eq(numspan).html());
numspan++;

}
//按下上方向键
if(event.which==38){

numspan--;
if(numspan==len)
 numspan=0;
for(var i=0;i<len;i++){
 if(numspan==i){
  keyword<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.children().eq(i).css({
   "background-color":"rgba(0,0.3)"
  });
 }
}
textb.val(keyword<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.children().eq(numspan).html());

}
});
keywordBox.children().mouSEOver(function(){
numspan=$(this).index();
for(var i=0;i<len;i++){
if(numspan==i){
keywordBox.children().eq(i).css({
"background-color":"rgba(0,0.3)"
});
}
}
textb.val(keywordBox.children().eq(numspan).html());
});

}