JS中Select下拉列表类(支持输入模糊查询)功能

545 阅读 0 评论 360 点赞

我是靠谱客的博主直率百褶裙，这篇文章主要介绍JS中Select下拉列表类(支持输入模糊查询)功能，现在分享给大家，希望可以做个参考。

下面给大家分享一段代码关于select下拉列表类支持输入模糊查询功能的实现代码，具体代码如下所示：

复制代码

<span style="font-size:14px;">  <HTML>    
  <HEAD>    
  <META http-equiv='Content-Type' content='text/html; charset=gb2312'>    
  <TITLE>可输入的下拉框</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>

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
<span style="font-size:14px;">  <HTML>    
  <HEAD>    
  <META http-equiv='Content-Type' content='text/html; charset=gb2312'>    
  <TITLE>可输入的下拉框</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>