1 <div style="position: relative;">
2 <div style="width: 100px; height: 100px; background-color: red;"></div>
3 <div style="visibility: hidden; position: absolute; top: 0;">
4 <div id="inner" style="width: 100px; height: 100px; background-color: green;"></div>
10 document.getElementById("inner").style.visibility = "visible";
12 if (window.testRunner) {
13 document.body.offsetTop;