The general idea is that window.onload fires when the document's window is ready for presentation and document.onload fires when the DOM tree (built from the ... ... <看更多>

The reason is that you are hijacking the onload event from the SharePoint javascript. See this post for help: Stop The Window.Onload Madness. ... <看更多>

onload fires when the document's window is ready for presentation and document.onload fires when the DOM tree (built from the markup code within the document) ... ... <看更多>

Note that older versions of IE do not support HTML5 File API, so the Base64 mode is used for testing. Get Base64 encoding on OSX / Windows (click to show). ... <看更多>