function keyUp(e) { 
　　       　 var currKey=0,e=e||event;
　　      　   currKey=e.keyCode||e.which||e.charCode;
　　      　　var keyName = String.fromCharCode(currKey);
　　       　 alert("按键码: " + currKey + " 字符: " + keyName); 
　　       }
　　       document.onkeyup = keyUp;

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 function text(event){
   var browser;
      if (document.all) 
          browser = "IE"; 
      else 
          browser = "FF";
      if(browser == "IE"){ 
          key = event.keyCode; 
      }else{  
          key=event.which;
      }
   alert(key); 
  }

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