Loading iframe subpages in javascript, adaptive height

Assume that there is a div on the home page, and an iframe is placed in it.
Copy codeThe Code is as follows:
<Div id = "frameBox">
<Iframe id = "frameWin" src = "1.html" name = "opWin" style = "width: 100%; height: 100% "frameborder =" 0 "scrolling =" no "> </iframe>
</Div>

The three menu links are loaded on the iframe.

The three subpages load window. onload on their own pages and execute
Copy codeThe Code is as follows:
Function aa (){
Var newHeight = document. body. scrollHeight + 20 + "px ";
Optional bytes parent.doc ument. getElementById ("frameBox"). style. height = newHeight;
// The above firefox is passed, but ie6 must add the following sentence. Otherwise, the iframe height is changed, but the visible area is not changed.
Optional bytes parent.doc ument. getElementById ("frameWin"). style. height = newHeight;
}

In the following method, you only need to put the code on the home page:
Page code:
Copy codeThe Code is as follows:
<Div style = "border: 1px solid #7e99c6" id = "frameBox">
<Iframe id = "frameWin" src = "01.html" name = "opWin" style = "width: 100%; height: 100% "frameborder =" 0 "scrolling =" no "onload =" test2 () "> </iframe>
</Div>

Js script (on the homepage ):
Copy codeThe Code is as follows:
Function test2 (){
Var frameWin = document. getElementById ("frameWin ");
Var frameBox = document. getElementById ("frameBox ");
Var newHeight;
If (frameWin. Document ){
NewHeight = frameWin. Document. body. scrollHeight + 20 + "px ";
} Else {
NewHeight = frameWin. contentDocument. body. scrollHeight + 20 + "px ";
}
FrameWin. style. height = newHeight;
FrameBox. style. height = newHeight;
}