屏蔽F5

禁用右键单击功能 

$(document).ready(function() { 
$(document).bind("contextmenu",function(e) { 
alert("sorry! No right-clicking!"); 
return false; 
}); 
}); 

屏蔽F5刷新

$(document).ready(function() { 
$(document).bind("keydown",function(e){ 
e=window.event||e; 
if(e.keyCode==116){ 
e.keyCode = 0; 
return false; 
} 
}); 
});