javascript 禁止鼠标右键的小例子

//禁止鼠标右键
function doProhibit() 
{ 
    if(window.Event)  
        document.captureEvents(Event.MOUSEUP); 
         
    function nocontextmenu()  
    { 
        event.cancelBubble = true  
        event.returnvalue = false; 
        return false; 
    } 
     
    function norightclick(e)  
    { 
        if (window.Event) 
        { 
            if (e.which == 2 || e.which == 3) 
            return false; 
        }  //www.jb200.com
        else if (event.button == 2 || event.button == 3)  
        { 
            event.cancelBubble = true  
            event.returnvalue = false; 
            return false; 
        } 
    } 
    document.oncontextmenu = nocontextmenu;  // for IE5+  
    document.onmousedown = norightclick;  //  
}