Jquery operates on the passing of two select values to each other

function moveToRight(select1,select2)//Moving the selected to the right sleect1 and sleect2 are the ids of the drop-down list boxes, respectively
{
 $('#'+select1+' option:selected').each(function(){
  $("<option value='"+$(this).val()+"'>"+$(this).text()+"</option>").appendTo("#"+select2+"");
  $(this).remove();
  $('#'+select2).bind('dblclick',function(){
  moveToLeft(select1,select2);
  });  
 });
}
function moveAllToRight(select1,select2)//Move everything to the right
{
 $('#'+select1+' option').each(function(){
  $("<option value='"+$(this).val()+"'>"+$(this).text()+"</option>").appendTo("#"+select2+"");
  $(this).remove();
 });
}
function moveToLeft(select1,select2)//Move the selected one to the left
{
 $('#'+select2+' option:selected').each(function(){
  $("<option value='"+$(this).val()+"'>"+$(this).text()+"</option>").appendTo("#"+select1+"");
  $(this).remove();
 });
}
function moveAllToLeft(select1,select2)//Move everything to the left
{
 $('#'+select2+' option').each(function(){
  $("<option value='"+$(this).val()+"'>"+$(this).text()+"</option>").appendTo("#"+select1+"");
  $(this).remove();
 });
}

If you double-click an option in a select to send the current value to another select, you need to bind a select event as follows

$('#sel2').bind('dblclick',function(){//Bind the double-click event to the drop-down box
     moveToRight('sel2','sel3');
    });
    $('#sel3').bind('dblclick',function(){
     moveToLeft('sel2','sel3');
    });