7 document
.getElementById("target").style
.height
= "100px";
12 <div style=
"height: 50px; background: red; width: 100px;" id=
"target">
13 <div style=
"height: 100%">
15 <iframe style=
"vertical-align: bottom; width: 100%; height:100%; background: green; border: 0;"></iframe>
20 document
.body
.offsetTop
;