js 键盘事件

 

<script>    
   function KeyDown(){ //屏蔽鼠标右键、Ctrl+n、shift+F10、F5刷新、退格键    
    //alert("ASCII代码是："+event.keyCode);    
    if ( (window.event.altKey)&&    
    (  (window.event.keyCode==37)|| //屏蔽 Alt+ 方向键 ←    
       (window.event.keyCode==39) )  ){ //屏蔽 Alt+ 方向键 →    
        alert("不准你使用ALT+方向键前进或后退网页！");    
        event.returnValue=false;    
    }   
   if ((event.keyCode==8) || //屏蔽退格删除键    
     (event.keyCode==116)|| //屏蔽 F5 刷新键    
     (event.keyCode==112)|| //屏蔽 F1 刷新键    
     (event.ctrlKey && event.keyCode==82)){ //Ctrl + R    
     event.keyCode=0;    
     event.returnValue=false;    
     alert("不准你使用快捷！");    
    }    
   if ((event.ctrlKey)&&(event.keyCode==78)) //屏蔽 Ctrl+n    
   {   
     alert("ctrl + n");   
    event.returnValue=false;    
   }   
    if ((event.shiftKey)&&(event.keyCode==121)) //屏蔽 shift+F10    
      {   
        alert(" shift+F10 ");   
        event.returnValue=false;    
     }   
    if (window.event.srcElement.tagName == "A" && window.event.shiftKey)    
   {   
      window.event.returnValue = false; //屏蔽 shift 加鼠标左键新开一网页    
   }   
       
    if ((window.event.altKey)&&(window.event.keyCode==115)){ //屏蔽Alt+F4    
    alert('Alt+F4');   
    //window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");    
    return false;   
}    
  }   
document.onkeydown = KeyDown      
</script>  

 

<script language="javascript" for="document" event="onkeydown">   
        var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;   
        if (keyCode == 13) {   
             controlForm(1);   
        }    
    </script>