js实现左右列表内容交换传递

<script language="javascript" type="text/javascript">

function move(formObj,toObj){

if(formObj.selectedIndex != -1){

toObj.add(new Option(formObj.options[formObj.selectedIndex].text,formObj.options[formObj.selectedIndex].value));

formObj.remove(formObj.selectedIndex);

//var index = formObj.selectedIndex;

}

}

</script>

<form name="form1">

<table>

<tr>

<td>

<select multiple name="left" size=7 ondblclick="move(this,this.form.right)">

<option value="0" selected>item1</option>

<option value="1">item2</option>

<option value="2">item3</option>

<option value="3">item4</option>

<option value="4">item5</option>

</select>

</td>

<td >

<input type="button" name="moveRigth" value=">>" onclick="move(this.form.left,this.form.right)"/>

<input type="button" name="moveLeft" value="<<" onclick="move(this.form.right,this.form.left)"/>

</td>

<td>

<select multiple name="right" size=7 ondblclick="move(this,this.form.left)">

<option value="0" selected>test1</option>

<option value="1">test2</option>

<option value="2">test3</option>

<option value="3">test4</option>

<option value="4">test5</option>

</select>

</td>

</tr>

</table>

</form>