google suggestion效果的键盘鼠标事件

google的suggestion功能是一个非常棒的用户体验创新，相信你之前也已经使用过了。由于某些原因，国内现在却不能使用这个功能了。
不过,你还可以在baidu上使用相同的功能。对于好点子好创意，模仿学习并不是件坏事。

<!doctype html> <html> <head> <meta charset='UTF-8' /> <style type='text/css'> .sugg{position:relative;font-size:12px;} .sugg a{text-decoration:none;} .sugg .text{width:210px;height:18px;padding:3px;color:#474747;border:1px solid #ADCAD8;} #suggestion{display:none;position:absolute;top:26px;left:0;width:216px;border:1px solid #3890d0;border-top:0;background:#fff;} #suggestion a{display:block;height:25px;line-height:25px;padding:0 5px;color:#000;} #suggestion a img{vertical-align:middle;} #suggestion #hover{background:#378ece;color:#fff;} </style> </head> <body> <div class='sugg'> <form id='suggF' action="http://www.baidu.com/baidu" onsubmit="document.charset='GBK';sug.hide()" accept-charset='GBK' target="_blank"> <input class='text' type=text name=wd autocomplete="off" onkeydown="pressKey(this,event)" /> <input id='sub' type="submit" value="搜索" /> </form> <div id='suggestion'> <a href='javascript:;' onmouseover="sug.hover(this);" onclick="sug.select();">思思</a> <a href='javascript:;' onmouseover="sug.hover(this);" onclick="sug.select();">芊芊</a> <a href='javascript:;' onmouseover="sug.hover(this);" onclick="sug.select();">cssass</a> <a href='javascript:;' onmouseover="sug.hover(this);" onclick="sug.select();">敏敏</a> <a href='javascript:;' onmouseover="sug.hover(this);" onclick="sug.select();">黎黎</a> </div> </div> suggestion显示之后，使用方向键或鼠标进行选择。 </body> <script type='text/javascript'> var $id=function(o){ return document.getElementById(o) || o; } var pressKey=function(o,e){ var e = e ? e : window.event; var k = e.keyCode; switch(k){ case 9 : //tab键 case 13 : return false; //回车键 default : sug.show(o,k); break; } } var sug={ show:function(o,k){ /* 此时动态读取suggestion数据（略）*/ document.getElementById('suggestion').style.display='block'; document.onclick=function(){sug.hide()}; if (k != 38 && k != 40 && k != 39 && k != 37) { //非方向键 sug.i = -1; } sug.i = sug.i || 0; var list = $id('suggestion').getElementsByTagName("a"); var prev = ''; switch(k){ case 38: sug.clear(); if (sug.i < 1) { sug.i = list.length } sug.i--; list[sug.i].id = "hover"; o.value = list[sug.i].innerHTML; return false; case 40: sug.clear(); if (sug.i == list.length - 1) { sug.i = -1 } sug.i++; list[sug.i].id = "hover"; o.value = list[sug.i].innerHTML; return false; default : break; } sug.hover=function(othis){ //鼠标划过 sug.clear(); for(i=0;i<list.length;i++){ if(othis==list[i]){ sug.i=i; list[sug.i].id="hover"; o.value = othis.innerHTML; return ; } } } sug.clear=function(){ prev = $id('hover'); if (prev) prev.id = ''; } sug.select=function(){ //鼠标选中 document.charset='GBK'; $id('suggF').submit(); } }, hide:function(){ $id('suggestion').style.display='none'; } }; </script> </html>

下面是加入google的数据（墙内也有几率可以看到效果）

<!doctype html> <html> <head> <meta charset='UTF-8' /> <style type='text/css'> .sugg{position:relative;font-size:12px;} .sugg a{text-decoration:none;} .sugg .text{width:210px;height:18px;padding:3px;color:#474747;border:1px solid #ADCAD8;} #suggestion{display:none;position:absolute;top:26px;left:0;width:216px;border:1px solid #3890d0;border-top:0;background:#fff;} .listitem{display:block;height:25px;line-height:25px;padding:0 5px;color:#000;cursor:pointer;} .itemhover{background:#378ece;color:#fff;} </style> <script type="text/javascript" src="/public/js/extend.js"></script> </head> <body> <div class='sugg'> <form id="searchForm" method="GET" action="http://www.baidu.com/baidu"> <input class='text' type=text name=wd autocomplete="off" id="keyInput" /> </form> <div id='suggestion'></div> </div> </body> <script type='text/javascript'> function Suggest(inputer, shower){ this.global = { keyElm : inputer, showElm : shower, ajaxURL : 'https://www.google.com/complete/search', ajaxData : { 'client' : 'hp', 'xhr' : 't' }, index : -1 } this.bind(); }; Suggest.prototype = { bind: function(){ var that = this; events.addEvent(this.global.keyElm, "keyup", function(){ var e = arguments[0] || window.event, k = e.keyCode; switch(k){ case 9 : //tab键 case 13 : //回车键 that.hide(); return false; case 37 : case 38 : case 39 : case 40 : that.select(k); //方向键 break; default : that.show(k); } }); events.delegate(this.global.showElm, ".listitem", "mouseover", function(){ var e = arguments[0] || window.event, target = e.srcElement || e.target; that.hover(target); }); events.addEvent(this.global.showElm,"click", function(){ $id("searchForm").submit(); }); events.addEvent(document, 'click', function(){ that.hide(); }); }, show: function(k){ var that = this; this.global.ajaxData.q = this.global.keyElm.value; $jsonp(this.global.ajaxURL, this.global.ajaxData, function(msg){ var list = msg[1], html = ''; if(!list.length ){ that.hide(); }else{ for(var i = 0 ; i< list.length; i++){ html += "<span class='listitem' idx="+i+">"+list[i][0]+"</span>"; }; that.global.showElm.style.display='block'; } that.global.showElm.innerHTML = html; }); }, hide: function(){ $id('suggestion').style.display='none'; }, select: function(k){ var list = $tag("span", $id('suggestion')); if(list.length < 1) return false; switch(k){ case 38: this.global.index --; if (this.global.index < 0) { this.global.index = list.length - 1; } break; case 40: this.global.index ++; if (this.global.index > list.length - 1) { this.global.index = 0 } break; default : return false; } this.setValue(list[this.global.index]); }, hover : function(target){ this.global.index = target.getAttribute("idx"); this.setValue(target); }, setValue : function(o){ removeClass($class("itemhover"), "itemhover"); addClass(o, "itemhover"); this.global.keyElm.value = o.innerText || o.textContent; } } new Suggest($id("keyInput"), $id("suggestion")); </script> </html>