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JS Select下拉框(支持输入模糊查询)

程序员文章站 2022-06-14 08:33:42
本文实例为大家分享了支持输入模糊查询的select下拉框,供大家参考,具体内容如下

本文实例为大家分享了支持输入模糊查询的select下拉框,供大家参考,具体内容如下

<html> 
<head> 
<meta http-equiv="content-type" content="text/html; charset=utf-8"> 
<title>insert title here</title> 
 <script language="javascript"> 
  
  function selectvalue(obj) 
 {  
  document.all.box2.value = obj.options[obj.selectedindex].text; 
 } 
  var j = 0; 
  function inputvalue(obj) 
 { 
  var n = 1;  
  var tmpobj; 
  var src = document.all.selectoption; 
  var msg = document.all.msg; 
  if(event.keycode != 40 && event.keycode != 38 && event.keycode != 13){ 
   if(obj.value!=""){ 
     msg.style.display=""; 
     msg.innerhtml=""; 
     if(msg.haschildnodes())  
     {  
     msg.childnodes[0].parentnode.removechild(msg.childnodes[0]);  
     } 
      
     for (var i=0;i<src.length;i++){ 
     var selvalue = document.createelement("div"); 
     var seltext = document.createelement("div"); 
     seltext.value = src(i).value; 
     seltext.innerhtml = src(i).text;    
  
     if (src(i).text.tolowercase().indexof(obj.value.tolowercase())==0){  
      seltext.setattribute("id","seltext"+n); 
      seltext.onmouseover=function (){  
      this.style.backgroundcolor='#003399';  
      this.style.color ='#ffffff';  
      } 
      seltext.onmouseout=function (){  
      this.style.backgroundcolor='#ffffff';  
      this.style.color ='#000000'; 
      } 
      seltext.onclick=function (){  
      document.all.box2.value = this.innerhtml; 
      msg.style.display="none"; 
      document.getelementbyid("txtsection").value=this.value; 
      } 
      msg.appendchild(seltext); 
      n++; 
     } 
     } 
   } 
   else { 
    document.all.msg.style.display="none"; 
   } 
  } 
  else { 
   //press down key 
   if(event.keycode==40){ 
    j++; 
    for (var i=0; i<src.length; i++) 
    { 
     tmpobj = document.getelementbyid("seltext"+i); 
     if(tmpobj != null){ 
      tmpobj.style.backgroundcolor='#ffffff';  
      tmpobj.style.color ='#000000'; 
     }     
    } 
    tmpobj = document.getelementbyid("seltext"+j); 
    if(tmpobj != null){ 
     tmpobj.style.backgroundcolor='#003399';  
     tmpobj.style.color ='#ffffff';  
    }else{ 
     j = 0; 
    }    
   } 
   //press up key 
   if (event.keycode==38){ 
    j--; 
    for (var i=0; i<src.length; i++) 
    { 
     tmpobj = document.getelementbyid("seltext"+i); 
     if(tmpobj != null){ 
      tmpobj.style.backgroundcolor='#ffffff';  
      tmpobj.style.color ='#000000'; 
     }     
    } 
    tmpobj = document.getelementbyid("seltext"+j); 
    if(tmpobj != null){ 
     tmpobj.style.backgroundcolor='#003399';  
     tmpobj.style.color ='#ffffff';  
    }else{ 
     j = 2; 
    }   
   } 
   //press enter key 
   if (event.keycode==13){ 
    tmpobj = document.getelementbyid("seltext"+j); 
    document.all.box2.value = tmpobj.innerhtml; 
    msg.style.display="none"; 
    document.getelementbyid("txtsection").value=tmpobj.value; 
   } 
  } 
 } 
   
 function selmatch(src) 
 { 
  var currsel = document.all.box2.value; 
  for (var i=0;i<src.length;i++){ 
   if (src(i).text==currsel) 
   { 
    src.options(i).selected = true; 
   }   
  } 
 } 
  
 function nomsg() 
 {  
  if(document.activeelement.id=="msg")  
   return false;  
  else 
   document.all.msg.style.display='none'; 
 } 
  
  
  </script> 
</head> 
<body> 
  
  <table border=0 cellpadding=1 cellspacing=0 width="100%"> 
   <tr>  
    <td width="24%"><font face="arial" size="2">查询</font></td> 
    <td colspan=3 width="76%">  
  
    <div style="position:relative;">  
    <span style="margin-left:230px;width:18px;overflow:hidden;"> 
     <select style="height: 22px; width: 250px; margin-left:-232px;" onchange="selectvalue(this)" onclick="selmatch(this)" id="selectoption" name="selectoption" >  
       <option >all</option> 
       <option >管理者1</option> 
       <option >管理者2</option> 
       <option >管理者3</option> 
       <option >业务员3</option> 
       <option >业务员3</option> 
       <option >13</option> 
       <option >103</option> 
     </select>  
     </span> 
     <input name="box2" id="box2" style="width:230px;position:absolute;left:0px;" onkeyup="inputvalue(this)" onblur="nomsg()" onfocus="this.select();inputvalue(this)" value="" >  
     <div id="msg" style="border:1px solid green; font-size :14px;white-space:nowrap;overflow:hidden; 
     width:230px;position:absolute;left:0px;top:20px;display:none"> 
    </div> 
   </div> 
   <input type="hidden" name="txtsection" id="txtsection"> 
     
   </td> 
  </tr> 
  </table> 
  
</body> 
</html> 


以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。