Canon Ixus Digital
I have a point and shoot camera, Canon Digital IXUS 100 IS and I need help !!!!?

How I can capture a picture with a depth of field? I mean I need a blurred background.

For the most part, this is achieved through a large aperture lens (the smaller f / stop number). People often wonder how to achieve this effect with a small P & S camera, but unfortunately that's not something those little things are very good. If you have manual controls, use of greater openness. If not, try to establish a portrait setting allows the camera to choose the larger opening is capable of. You can also try in the establishment of Macro – that may work to some extent. For more information, check out this Wikipedia article: http://en.wikipedia.org/wiki/Depth_of_field