使用jquery实现仿百度自动补全特效
新建index.html文件,直接复制下面代码到新建的文件index.html里面,用浏览器访问,仅用于参考:
<!doctypehtml> <html> <metacharset="utf-8"> <style> body{ margin-left:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; } .auto_hidden{ width:204px;border-top:1pxsolid#333; border-bottom:1pxsolid#333; border-left:1pxsolid#333; border-right:1pxsolid#333; position:absolute; display:none; } .auto_show{ width:204px; border-top:1pxsolid#333; border-bottom:1pxsolid#333; border-left:1pxsolid#333; border-right:1pxsolid#333; position:absolute; z-index:9999;/*设置对象的层叠顺序*/ display:block; } .auto_onmouseover{ color:#ffffff; background-color:highlight; width:100%; } .auto_onmouseout{ color:#000000; width:100%; background-color:#ffffff; } </style> <scriptlanguage="javascript"> <!-- var$=function(id){ return"string"==typeofid?document.getElementById(id):id; } varBind=function(object,fun){ returnfunction(){ returnfun.apply(object,arguments); } } functionAutoComplete(obj,autoObj,arr){ this.obj=$(obj);//输入框 this.autoObj=$(autoObj);//DIV的根节点 this.value_arr=arr;//不要包含重复值 this.index=-1;//当前选中的DIV的索引 this.search_value="";//保存当前搜索的字符 } AutoComplete.prototype={ //初始化DIV的位置 init:function(){ this.autoObj.style.left=this.obj.offsetLeft+"px"; this.autoObj.style.top=this.obj.offsetTop+this.obj.offsetHeight+"px"; this.autoObj.style.width=this.obj.offsetWidth-2+"px";//减去边框的长度2px }, //删除自动完成需要的所有DIV deleteDIV:function(){ while(this.autoObj.hasChildNodes()){ this.autoObj.removeChild(this.autoObj.firstChild); } this.autoObj.className="auto_hidden"; }, //设置值 setValue:function(_this){ returnfunction(){ _this.obj.value=this.seq; _this.autoObj.className="auto_hidden"; } }, //模拟鼠标移动至DIV时,DIV高亮 autoOnmouseover:function(_this,_div_index){ returnfunction(){ _this.index=_div_index; varlength=_this.autoObj.children.length; for(varj=0;j<length;j++){ if(j!=_this.index){ _this.autoObj.childNodes[j].className='auto_onmouseout'; }else{ _this.autoObj.childNodes[j].className='auto_onmouseover'; } } } }, //更改classname changeClassname:function(length){ for(vari=0;i<length;i++){ if(i!=this.index){ this.autoObj.childNodes[i].className='auto_onmouseout'; }else{ this.autoObj.childNodes[i].className='auto_onmouseover'; this.obj.value=this.autoObj.childNodes[i].seq; } } } , //响应键盘 pressKey:function(event){ varlength=this.autoObj.children.length; //光标键"↓" if(event.keyCode==40){ ++this.index; if(this.index>length){ this.index=0; }elseif(this.index==length){ this.obj.value=this.search_value; } this.changeClassname(length); } //光标键"↑" elseif(event.keyCode==38){ this.index--; if(this.index<-1){ this.index=length-1; }elseif(this.index==-1){ this.obj.value=this.search_value; } this.changeClassname(length); } //回车键 elseif(event.keyCode==13){ this.autoObj.className="auto_hidden"; this.index=-1; }else{ this.index=-1; } }, //程序入口 start:function(event){ if(event.keyCode!=13&&event.keyCode!=38&&event.keyCode!=40){ this.init(); this.deleteDIV(); this.search_value=this.obj.value; varvalueArr=this.value_arr; valueArr.sort(); if(this.obj.value.replace(/(^\s*)|(\s*$)/g,'')==""){return;}//值为空,退出 try{varreg=newRegExp("("+this.obj.value+")","i");} catch(e){return;} vardiv_index=0;//记录创建的DIV的索引 for(vari=0;i<valueArr.length;i++){ if(reg.test(valueArr[i])){ vardiv=document.createElement("div"); div.className="auto_onmouseout"; div.seq=valueArr[i]; div.onclick=this.setValue(this); div.onmouseover=this.autoOnmouseover(this,div_index); div.innerHTML=valueArr[i].replace(reg,"<strong>$1</strong>");//搜索到的字符粗体显示 this.autoObj.appendChild(div); this.autoObj.className="auto_show"; div_index++; } } } this.pressKey(event); window.onresize=Bind(this,function(){this.init();}); } } //--> </script> <body> <divalign="center"style="padding-top:50px"> <inputtype="text"style="width:300px;height:20px;font-size:14pt;"placeholder="请输入a或b模拟效果"id="o"onkeyup="autoComplete.start(event)"> </div> <divclass="auto_hidden"id="auto"><!--自动完成DIV--></div> <script> varautoComplete=newAutoComplete('o','auto',['b0','b12','b22','b3','b4','b5','b6','b7','b8','b2','abd','ab','acd','accd','b1','cd','ccd','cbcv','cxf']); </script> </body> </html>
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