The client's onload event handler is invoked when the CM provider sets the IFrame SRC to the return URL.

当CM提供者设置IF rame src以返回url时，客户的onload事件处理器得到激活。

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You can use the onload event handler to test that specific fields (on which the update panel depends) are populated.

您可以使用 onload 事件处理程序测试该特定字段（更新面板所依赖的字段）是否已填充。

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In the Listing 5, the DOM is used to lodge an onload event handler which fires the initialize function once the XUL page is fully received.

在清单5中，DOM用来存放一个装载事件处理程序，当XUL页面完全接收时，这个事件激活initialize函数。

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