Question

我有两组选择。只有在选择了第一个选择小组的备选办法,并且选择了第二个选择小组的备选办法时,才可以指定一个职能?

Answer 1

Sure。

传真:

What is your preferred vacation spot?<br>
<SELECT ID="my_select"> 

<OPTGROUP LABEL="OptGroup One." id="one">        
<OPTION LABEL="Florida">Florida</OPTION>         
<OPTION LABEL="Hawaii">Hawaii</OPTION>         
<OPTION LABEL="Jersey">Jersey Shore</OPTION>    
</OPTGROUP> 

<OPTGROUP LABEL="OptGroup Two" id="two">  
<OPTION LABEL="Paris">Paris</OPTION>  
<OPTION LABEL="London">London</OPTION> 
<OPTION LABEL="Florence">Florence</OPTION>  
</OPTGROUP>

</SELECT>

JS:

$("#my_select").change(function(){
    var selected = $("option:selected", this);
    if(selected.parent()[0].id == "one"){
        //OptGroup 1, do something here..
    } else if(selected.parent()[0].id == "two"){
        //OptGroup 2, do something here
    }
});

www.un.org/Depts/DGACM/index_spanish.htm 例:http://jsfiddle.net/pyG2v/>http://jsfiddle.net/pyG2v//strong>

Answer 2

$( #selectID ).change(function(){
  var $option = $( option:selected , this); // get selected option
  var optGroup = $option.closest( optgroup ).index(); // get which optgroup
  if(optGroup == 0){
    // first
  }
  else if(optGroup == 1){
    // second
  }
  else{
    // not first or second
  }
});

Answer 3

当你点击选择时,你获得选择小组的伊德名称。

    var obj = {};
$( select[name=queue] ).on( change , function () {
    obj = {};
    var options = $( option:selected , this); //the selected options
    $.each(options, function (index, option) {
        var optgroupIndex = $(option).closest( optgroup ).index() //get the index
        var optgroupId = $(option).parent()[0].id //get id
        if (obj.hasOwnProperty(optgroupId)) {
            obj[optgroupId].push($(option).val());
        } else {
            obj[optgroupId] = [$(option).val()];
        }
    });
    var textRows = [];
    $.each(obj, function(optgroupId, values){
        textRows.push(optgroupId +": " + values.join( ,  ));
    });
    $( #demo ).html(textRows.join("<br>"));
});

 /*Additional*/
select::-webkit-scrollbar {display:none;}
select::-moz-scrollbar {display:none;}
select::-o-scrollbar {display:none;}
select::-google-ms-scrollbar {display:none;}
select::-khtml-scrollbar {display:none;}
select{height:150px;}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<select name= queue  multiple> 
<optgroup label="Frist Queue" id="Frist Queue">
<option value="Person1">Person1</option>         
<option value="Person2">Person2</option>         
<option value="Person3">Person3</option>    
</optgroup>
<optgroup label="Second Queue" id="Second Queue">  
<option value="Person1">Person1</option>  
<option value="Person2">Person2</option> 
</optgroup>
</select>

<div id="demo"></div>

友情链接