syntax:

gd.interlace(flag)

where:

flag - A boolean value indicating whether this image is interlaced or not

return:

void.

description:

This method sets the interlace flag for the current image. If the flag parameter is true, then the image is interlaced, otherwise it is not. Interlaced GIF images allow views to gradually fade in the image, rather than having to read in the whole file and then display it. This flag only affects the image once it is saved as a GIF file. It has no affect on any other methods. Viewers which don't support interlacing will still be able to display the image, it will just appear all at once like any other image.

see:

#link <gd>, GD getInterlaced()