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JS中Select下拉列表類(lèi)(支持輸入模糊查詢(xún))功能

更新時(shí)間：2017年01月17日 09:58:14 作者：hanchuang213

這篇文章主要介紹了JS中Select下拉列表類(lèi)(支持輸入模糊查詢(xún))功能，代碼簡(jiǎn)單易懂，非常不錯(cuò)，具有參考借鑒價(jià)值，需要的朋友參考下吧

下面給大家分享一段代碼關(guān)于select下拉列表類(lèi)支持輸入模糊查詢(xún)功能的實(shí)現(xiàn)代碼，具體代碼如下所示：

<span style="font-size:14px;">  <HTML>    
  <HEAD>    
  <META http-equiv='Content-Type' content='text/html; charset=gb2312'>    
  <TITLE>可輸入的下拉框</TITLE>    
  </HEAD>    
  <BODY >    
   <Script Language="Javascript">  
  var j = 0;  
  function SelectValue(obj)  
  {  
    var input = obj.parentNode.nextSibling;  
    document.all.box2.value = obj.options[obj.selectedIndex].text;  
    document.getElementById("txtSection").value=obj.options[obj.selectedIndex].value;  
    alert(document.getElementById("txtSection").value);  
  }  
  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>  
   <TABLE border=0 cellPadding=1 cellSpacing=0 width="100%">  
     <TR>   
     <TD width="24%"><font face="Arial" size="2">Section</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 value='ALL' Selected>ALL</OPTION>  
  <OPTION value='0TEST1'>0TEST1 = Testing 1  
  <OPTION value='0TEST1'>0TEST2 = Testing 1  
  <OPTION value='0TEST1'>0TEST3 = Testing 1  
  <OPTION value='SECTION'>SECTION = Section Description XXXXX AAA  
  </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="0" >    
  <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>  
  <p>  
  </BODY>
</HTML>  
</span>

以上所述是小編給大家介紹的JS中Select下拉列表類(lèi)(支持輸入模糊查詢(xún))功能，希望對(duì)大家有所幫助，如果大家有任何疑問(wèn)請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)腳本之家網(wǎng)站的支持！

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