function moveToEnd(node){
  var pos = node.value.length;
  if(node.createTextRange){//I.E
         var textRange = node.createTextRange();
         textRange.move('textedit');
         textRange.select();
     }else if(node.setSelectionRange){
         node.setSelectionRange(pos,pos);
     } 
 }

// textarea 에서는 안해봄..