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List move around 2017-03-23

Source: Internet
Author: User
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<body>

<select id= "S1" size= "ten" >

<option> Red </option>

<option> Green </option>

<option> Blue </option>

<option> Black </option>

<option> White </option>

</select>

<select id= "S2" size= "ten" >

<option> Apple </option>

<option> Banana </option>

<option> Peaches </option>

<option> pear </option>

<option> oranges </option>

</select><br/>

<input type= "button" id= "T1" value= " move right "/>

<input type= "button" id= "T2" value= " shift left "/>

<script>

document.getElementById ("T1"). Onclick=function () { ----- Move right

var Op=document.getelementbyid ("S1"). Selectedoptions; --------- Assign the selected data to the op

document.getElementById ("S2"). AppendChild (op[0]); ------ indicates that the index value in the selected data is 0

document.getElementById ("S1"). RemoveChild (Op[0]);

}

document.getElementById ("T2"). Onclick=function () { ---- move left

var Op=document.getelementbyid ("S2"). Selectedoptions;

document.getElementById ("S1"). AppendChild (Op[0]);

document.getElementById ("S2"). RemoveChild (Op[0]);

}

</script>

</body>

List move around 2017-03-23

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