实用的ajax自动完成 下拉提示框

<script language="javascript">
var intIndex=0;arrList = new Array();
function dearray(aa)//定义array
...{
  //document.write(aa);
  arrList = aa.split(',');
  intIndex = arrList.length；
}
function test() ...{
   init();
   dearray("asp,csdn,aaaa,bbbbc,afd,werwe,adfs,ertr,qwq,qwqwq,trt,uyus,dsfs,uere,add,234,2,1dr4,ae4564,adf4645,afa3543,sdfse5,ae345345,sdf4564,34346536");
   smanPromptList(arrList,"aspx");
   dearray("1sdfsdf.com,a11sdafs.net,b22dsafsdf,c333asdfsadf,4444dsafasdf,dddsfddsafdsaf,121213dsafsdaf,43213asdfadsf,dsa3121dasf3,a213,323313,3213,32213,dsfsdddd,ds11dfsfd,ffdafd,afdfd,afd,baffad,2fda2fd,dasd");
   smanPromptList(arrList,"aspx2");
   smanPromptList(arrList,"inputer")
}
function init() ...{
if (arrList.constructor!=Array)...{alert('smanPromptList初始化失败:第一个参数非数组!');return ;}
   arrList.sort( function(a, b) ...{
   if(a.length>b.length)return 1;
   else if(a.length==b.length)return a.localeCompare(b);
   else return -1;
       }
   );
}
function smanPromptList(arrList,objInputId)...{
       var objouter=document.getElementById("__smanDisp") //显示的DIV对象
       var objInput = document.getElementById(objInputId); //文本框对象
       var selectedIndex=-1;
       var intTmp; //循环用的:)
       if (objInput==null) ...{alert('smanPromptList初始化失败:没有找到"'+objInputId+'"文本框');return ;}
           //文本框失去焦点
           objInput.onblur=function()...{
               objouter.style.display='none';
           }
           //文本框按键抬起
           objInput.onkeyup=checkKeyCode;
           //文本框得到焦点
           objInput.onfocus=checkAndShow;
           function checkKeyCode()...{
               var ie = (document.all)? true:false
               if (ie)...{
                   var keyCode=event.keyCode
                   if (keyCode==40||keyCode==38)...{ //下上
                       var isUp=false
                       if(keyCode==40) isUp=true ;
                       chageSelection(isUp)
                   }else if (keyCode==13)...{//回车
                       outSelection(selectedIndex);
                   }else...{
                       checkAndShow()
                   }
               }else...{
                   checkAndShow()
               }
               divPosition()
           }
           function checkAndShow()...{
                       var strInput = objInput.value
                       if (strInput!="")...{
                           divPosition();
                           selectedIndex=-1;
                           objouter.innerHTML ="";
                           for (intTmp=0;intTmp<arrList.length;intTmp++)...{
                               if (arrList[intTmp].substr(0, strInput.length)==strInput)...{
                                   addOption(arrList[intTmp]);
                               }
                           }
                           objouter.style.display='';
                       }else...{
                           objouter.style.display='none';
                   }
                   function addOption(value)...{
                       objouter.innerHTML +="<div onmouseover="this.className='sman_selectedStyle'" onmouseout="this.className=''" onmousedown="document.getElementById('"+objInputId+"').value='" + value + "'">" + value + "</div>"    
                   }
           }
           function chageSelection(isUp)...{
               if (objouter.style.display=='none')...{
                   objouter.style.display='';
               }else...{
                   if (isUp)
                       selectedIndex++
                   else
                       selectedIndex--
               }
               var maxIndex = objouter.children.length-1;
               if (selectedIndex<0)...{selectedIndex=0}
               if (selectedIndex>maxIndex) ...{selectedIndex=maxIndex}
               for (intTmp=0;intTmp<=maxIndex;intTmp++)...{
                   if (intTmp==selectedIndex)...{
                       objouter.children[intTmp].className="sman_selectedStyle";
                   }else...{
                       objouter.children[intTmp].className="";
                   }
               }
           }
           function outSelection(Index)...{
               objInput.value = objouter.children[Index].innerText;
               objouter.style.display='none';
           }
           function divPosition()...{
               objouter.style.top    =getAbsoluteHeight(objInput)+getAbsoluteTop(objInput);
               objouter.style.left    =getAbsoluteLeft(objInput);
               objouter.style.width=getAbsoluteWidth(objInput)
           }
   }
   document.write("<div id='__smanDisp' style='position:absolute;display:none;background:#E8F7EB;border: 1px solid #CCCCCC;font-size:14px;cursor: default;' onbulr> </div>");
   document.write("<style>.sman_selectedStyle{background-Color:#102681;color:#FFFFFF}</style>");
   function getAbsoluteHeight(ob)...{
       return ob.offsetHeight
   }
   function getAbsoluteWidth(ob)...{
       return ob.offsetWidth
   }
   function getAbsoluteLeft(ob)...{
       var mendingLeft = ob .offsetLeft;
       while( ob != null && ob.offsetParent != null && ob.offsetParent.tagName != "BODY" )...{
           mendingLeft += ob .offsetParent.offsetLeft;
           mendingOb = ob.offsetParent;
       }
       return mendingLeft ;
   }
   function getAbsoluteTop(ob)...{
       var mendingTop = ob.offsetTop;
       while( ob != null && ob.offsetParent != null && ob.offsetParent.tagName != "BODY" )...{
           mendingTop += ob .offsetParent.offsetTop;
           ob = ob .offsetParent;
       }
       return mendingTop ;
   }
</script>
<body onload="test()">
</body>
请输入内容：
<input type="text" id="inputer"> 如 a  提示东东 和 下面不一样的
<br>
<font color="red">
请输入内容：<br>
<input type="text" id="aspx">如 a  提示东东 和 下面不一样的
<br>
</font>
<input type="text" id="aspx2"><br>
<font color="red" >
我想实现 &lt;input type="text" id="aspx2" onclick="函数(东东1，东东2，东东3);" &gt; <br>
就提示 东东1<br>
东东2<br>
东东3<br>
&lt;input type="text" id="aspx2" onclick="函数(提示1，提示2，提示3);" &gt; <br>
就提示 提示1<br>
提示2<br>
提示3<br>
</font>