[рони]

tenebrosus,

var test ={
    url: '/reg/',
    cache: false,
    success: function(data) {
 var div = document.createElement('div');
 div.innerHTML = data;
 var elem = div.querySelector('#red');
 alert(elem.innerHTML)
    }
};
var data = "<div><b></b></div><span id='red'>12345</span>"
test.success(data)