fixed

DELETEELEMENT:

    while(cur){

        if(cur->getType()==HtmlEl){

            if(((HtmlElement*)cur)->_childElement){

        delelm.push(cur);

        if(cur->getType()==HtmlEl && ((HtmlElement*)cur)->_childElement){

            parents.push((HtmlElement*)cur);

            cur=((HtmlElement*)cur)->_childElement;

        }else{

            cur=cur->_nextElement;

        }

    }

        Element *next=cur->_nextElement;

        cur->_firstElement=nullptr;

        cur->_prevElement=nullptr;

        cur->_nextElement=nullptr;

        delelm.push(cur);

        cur=next;

    }

    if(!parents.empty()){

        cur=parents.top();

        ((HtmlElement*)cur)->_childElement=nullptr;

        cur=parents.top()->_nextElement;

        parents.pop();

        goto DELETEELEMENT;

    }

    while(!delelm.empty()){

        if(delelm.top()!=this)

            delete delelm.top();

        Element *del=delelm.top();

        del->_firstElement=nullptr;

        del->_prevElement=nullptr;

        del->_nextElement=nullptr;

        if(del!=this){

            delete del;

        }

        delelm.pop();

    };