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<option value="3">Item 3
</select>
<script>
function bao(s)
{
    txt.value+=s;
    //Ñ¡Ôñºó,ÈõÚÒ»ÏѡÖÐ,ÕâÑù,¾ÍÓÐChangeÀ².
    document.all.sel.options[0].selected=true;
}
</script>
<textarea id=txt></textarea>
 


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