Common iframe splitting _ javascript skills for javascript websites

That is, a page uses two iframe to call the content and implement page navigation, which is easier to control and can control the control block in the middle. In fact, it is also an iframe and Its width is defined as 10.
Then, in his internal js, control the left and right two iframe.

The Code is as follows:

Function switchSysBar (){
If (parent.doc ument. getElementById ('attachucp'). cols = "160,10 ,*"){
Document. getElementById ('leftbar'). style. display = "";
Parent.doc ument. getElementById ('attachucp'). cols = "0, 10 ,*";
}
Else {
Parent.doc ument. getElementById ('attachucp'). cols = "160,10 ,*";
Document. getElementById ('leftbar'). style. display = "none"
}
}

</Frameset>
[Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]