js 中 处理CTRL键

这是一个在Javascript中处理CTRL键的简单的例子

< 
  script language 
  = 
  " 
  javascript 
  " 
  > 
    
 
  function 
   keyDown(e) 
  ... 
  {  
    var ieKey=event.keyCode;  
    if(event.ctrlKey)
      document.forms[0].myKey.value="ctrl";  
    else
      document.forms[0].myKey.value=""; 

      if(event.keyCode!=17)document.forms[0].myKey.value=document.forms[0].myKey.value + "("+ieKey + ")"; 
} 
    
document.onkeydown 
  = 
  keyDown;  
 
  </ 
  script 
  > 
   
 
  < 
  form name 
  = 
  " 
  keyform 
  " 
  >< 
  input type 
  = 
  " 
  text 
  " 
   name 
  = 
  " 
  myKey 
  " 
   value 
  = 
  "" 
   size 
  = 
  " 
  20 
  " 
  ></ 
  form 
  >