$(document).ready(function(){
    set_tc();
    function set_tc() {
      $('#tc2').eraser({
        size: 15, 
        completeRatio: .9,
        completeFunction: clean_tc
      });
    }
    function clean_tc(){
      $('#tc2').eraser('clear');
    }
})

function reset_tc(){
    $('#tc2').eraser('reset');
}