jQuery Grid Plugin - jqGrid

Hello

I do:

<script>
function myelem (value, options) {
  var el = document.createElement("input");
  el.type="text";
  el.value = value;
  return el;
}
 
function myvalue(elem, operation, value) {
    if(operation === 'get') {
       return $(elem).find("input").val();
    } else if(operation === 'set') {
       $('input',elem).val(value);
    }
}
jQuery("#grid_id").jqGrid({
...
   colModel: [ 
      ... 
      {name:'price', ..., editable:true, edittype:'custom', editoptions:{custom_element: myelem, custom_value:myvalue} },
      ...
   ]
...
});
</script>

Result: Error e1. How i can do custom element?