Print only iframe using window.print()

[FatBo]

Dear all,

I have some questions on printing iframe with javascript.
Suppose I have several iframes in a .html file. While I called the
window.print() function, the parent document is also printed. How can I
disabled the parent document so that only the contents in the iframes
are printed out? I found that it is difficult to use the javascript
print() function because I just want the print dialog to show once.

Thank you for every one!!!
Fatbo