function editMode(el){

 var elm=$(el).clone(true);

//work with  elm, ad input elements 

$(el).replaceWith(elm);

return el;

}  

var p=$(".editArea").first();

var pp= p.clone();

p.before(pp);

ppp=editMode(pp);

//code below don't work, all elements input must  nulled, without cloning code work

//t.length==0

td=$(ppp).find("td,span"); 

$(td).each(function(){

var t=$(this).children("input");

if(t.length){

t.val("");

} });