//under your webView code
[self hideGradientBackground:webView];
//elsewhere in the same file. This is called by the above code
- (void) hideGradientBackground:(UIView*)theView
{
for (UIView* subview in theView.subviews)
{
if ([subview isKindOfClass:[UIImageView class]])
subview.hidden = YES;
[self hideGradientBackground:subview];
}
}