replace links

link_replace.js

  /*  aaData[aiDisplay[i]][9] String  was like this and i want to get Integer 6947 */
                            /*<a href="#">
                               <button type="button" class="btn btn-outline btn-success btn-xs"> 6947 </button>
                            </a>*/
                            
                            var cost  =  aaData[aiDisplay[i]][9].replace(/<a\b[^>]*>/i,"");
                            cost  =  cost.replace(/<button\b[^>]*>/i,"");
                            cost  =  cost.replace(/<\/a>/i, "");
                            cost  =  cost.replace(/<\/button>/i, "");


                            console.log(parseInt(cost));