A frame in a frameset may become blank on an ASP page or in an ASP.NET application(frameset 可能变成空白)
来源：互联网 发布：java 时间加减 编辑：程序博客网 时间：2024/06/06 02:37
http://support.microsoft.com/kb/840545/en-us/
在frameset框架中，如果在处理onchange时，面面回传了另一个post。则会导致该框架变成空白blank。
处理的方法：
1.在面面卸载前（onbeforeunload）对面面进行处理，不回传后面的post.
ex:<body onbeforeunload="Workaround2()">
function Workaround2() { debugger; document.body.innerHTML = "請等待回應!"; }
2.在onchange时检查面面的状态。document.readyState !="complete"/"loading"，如果是complete就回传，否则放弃。
ex:function Check()
{ debugger;
if (document.readyState !="complete")
{ return false; }
else
{ __doPostBack('document.activeElement.id',''); }
}
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