javascript - IE problem with optgroup / option onclick event -

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this doesn't work ie7. know work around? 

<select>   <optgroup label="swedish cars">     <option value="volvo">volvo</option>     <option value="saab">saab</option>   </optgroup>   <optgroup label="german cars">     <option value="mercedes" onclick="alert(1);">mercedes</option>     <option value="audi">audi</option>   </optgroup> </select>

when pick mercedes, can see alert box. doesn't happen in ie.

try this

<select onclick="myalert(this.value)">   <optgroup label="swedish cars">     <option value="volvo">volvo</option>     <option value="saab">saab</option>   </optgroup>   <optgroup label="german cars">     <option value="mercedes">mercedes</option>     <option value="audi">audi</option>   </optgroup> </select> <script>    function myalert(value) {      switch(value) {        case "mercedes":           alert(1);           break;        }    } </script>

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