<input type="button" value="click me" onclick="fireClick(my)">
<span id="myspan"> 11111111111112 </span>
<script>


function addEventListener(element, strEvent, callback){
  if (element.addEventListener) 
    element.addEventListener(strEvent, callback, false);
  else
    element.attachEvent("on" + strEvent, callback);
}

function fireClick(element){
  if( document.createEvent ) {
    var evObj = document.createEvent('MouseEvents');
    evObj.initEvent( 'click', true, false );
    element.dispatchEvent(evObj);

  } else if( document.createEventObject ) {
    element.fireEvent('onclick');
  }
}

var my = document.getElementById("myspan")
addEventListener(my,'click',function(){alert( 1 )})
addEventListener(my,'click',function(){alert( 2 )})
addEventListener(my,'click',function(){alert( 3 )})
addEventListener(my,'click',function(){alert( 4 )})
</script>