jquery add element to form dynamically

 
//function that adds element to form  
function addElem(frm, id, val) { 
                $('<input>').attr({ 
                        type: 'hidden', 
                        id: id, 
                        name: id, 
                        value: val, 
                        class: 'tslct' 
                }).appendTo(frm); 
} 
 
//example of using of this function  
var frm = $(this).closest('form'); 
addElem(frm,  "myId", "myvalue");