Errrhh... Why

I created a template for my site in photoshop. I have a gradient background on one layer. If i crop a part of the site into a small rectanlge, the gradient changes to match the small part the i have cropped... is there a way to stop this from happening as i have to keep saving the psd as a jpg and then crop it from there,

thanks in advance

 

I don't really understand your dilemma but you could try a few things.

First, you shouldn't be cropping your template piece by piece and then using those to create a site. You should be using slicing to make you work easier and potentially cleaner. A tutorial similar to this one might help you if you are unfamiliar with this method.
If you are trying to simply resize a few layers at once without messing with the background you can just highlight the layers that you want to change (shift+click or ctrl+click each layer) then use Edit>Transform to manipulate those selected layers.
A final option would be to turn your gradient into a custom pattern fill (this will only work if your gradient is linear and not radial). To do this, use the rectangular marquee tool and select a thin strip of your gradient (1-5px wide should be enough) and however tall it is. With this selected use Edit>Define Pattern. It will now ask you to name your pattern. To use this pattern, all you have to do is select the paint bucket tool and in a drop down menu near the top (currently set at Foreground) then select your new pattern from the menu right next to that one.

Hopefully something helped, I didn't fully understand your question and please forgive me if you already know any or all of this. I don't want you to think that I am talking down to you if you know all these options.

 

Ok, thanks guys for all your help

 

good tutorial.... everyday i search at google how to make template using photoshop but i not found familiar what i want... now i found it in here...

thanks

 

Try rasterizing the gradient layer