你很幸运我准备了一个空白的HTML页面:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta content="text/html; charset=UTF-8" http-equiv="content-type" />
<meta charset="utf-8" />
<title>Test</title>
<style type="text/css">
.hidden {
display: none;
}
</style>
</head>
<body>
<form>
<input type="submit" id="submit" onclick="document.getElementById('hidden').style.display = 'block';" />
</form>
<img id="hidden" class="hidden" src="foo.png" />
</body>
</html>
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