I looked for it and couldn't find it on the forum, I think it's a simple thing.    based on this topic: http://forums.unigui.com/index.php?/topic/24462-detect-cancel-opendialog-in-tunifileuploadbutton/  and I will use a "UniHTMLFrame" instead of "unifileuploadbutton"  How do I need to simulate Click?  UniHTMLFrame1.JSInterface.JSCall('fileInputEl.dom.click', []); // Error  UniHTMLFrame1.JSInterface.JSCall('dom.click', []); // Error  UniHTMLFrame1.JSInterface.JSCall('clic