IE11不支持 onload吗？为什么我的问候语出不来

  <head>

    <title>iRock - The Virtual Pet Rock</title>



    <script type="text/javascript" src="cookie.js"></script>



    <script type="text/javascript">

      var userName;



      function resizeRock() {

        document.getElementById("rockImg").style.height = (document.body.clientHeight - 100) * 0.9;

      }



      function greetUser() {

       if (navigator.cookieEnabled)

       userName = readCookie("irock_username");

		

	//出现问题的地方	

        if (userName)

          alert("Hello " + userName + ", I missed you.");

        else

          alert('Hello, I am your pet rock.');

	

      }



      function touchRock() {

        if (userName) {

          alert("I like the attention, " + userName + ". Thank you.");

        }

        else {

          userName = prompt("What is your name?", "Enter your name here.");

          if (userName) {

            alert("It is good to meet you, " + userName + ".");

            if (navigator.cookieEnabled)

              writeCookie("irock_username", userName, 5 * 365);

            else

              alert("Cookies aren't supported/enabled in your browser, which means I won't remember you later. I'm sorry.");

          }

        }

        document.getElementById("rockImg").src = "rock_happy.png";

        setTimeout("document.getElementById('rockImg').src = 'rock.png';", 5 * 60 * 1000);

      }

    </script>

  </head>



  <body onload="resizeRock(); greetUser();" onresize="resizeRock();">

    <div style="margin-top:100px; text-align:center">

      <img id="rockImg" src="rock.png" alt="iRock" style="cursor:pointer" onclick="touchRock();" />

    </div>

  </body>

</html>