js iframe刷新

1.获取某个iframe下面的值

document.getElementById('verifyIframe').contentWindow.document.getElementById('hidden_uuid').value;

2.创建+刷新

function resetMobileToken(){


 var verifyIframe=document.getElementById('verifyIframe');
 if(verifyIframe){
//有了就刷新
 document.getElementById('verifyIframe').contentWindow.location.reload();
 return;
  }
//没有就创建
 verifyIframe= document.createElement("iframe");//创建iframe
 verifyIframe.src="abc.jsp";
 verifyIframe.id="verifyIframe";
 verifyIframe.name="verifyIframe";
 verifyIframe.style.display="none";
 document.body.appendChild(verifyIframe);
 
}

 abc.jsp //因为我想每次iframe中的token_uuid不一样，所以才要刷新

<%@page import="java.util.UUID"%>
<%
session.setAttribute("token_uuid",UUID.randomUUID());

%>
<input  type="hidden" id="hidden_uuid" value="<%=session.getAttribute("token_uuid")%>"/>