用jquery扑捉回车键触发的事件

$("html").die().live("keydown",function(event){ 
if(event.keyCode==13){ 
//这里添加要处理的逻辑 
} 
}); 
//绑定回车动作 
$('textarea[name=chattext]').keydown(function(event){ 
if(event.which==13){ 
} 
});

$.ajax({ 
url : "${pageContext.request.contextPath}/UOSRoleManangerAction.do?method=createRole", 
type : "post", 
dataType : "html", 
data:{"roleName":roleName,"roleDescription":roleDescription,"roles":roles,"types":types}, 
success : function(data){ 
var dataObj=eval("("+data+")"); 
if(dataObj.result){ 
alert("操作成功！"); 
submitForm(null,"initPage"); 
}else { 
alert("操作失败！"); 
} 
} 
});