Im using inspiration 15 series.Now its screen side is braking off regularly.Is there any solution for that.Also can i change this portion as seems its a part of screen
Whatever is broken -- it's impossible to determine from your description - would need replacement. It may be a hinge problem, and if it's a touchscreen model, that usually means replacing the entire upper assembly, screen included. To determine for sure, post a photo AND the complete model number (i.e., inspiron 1521, N5110, etc.) -- and screen type (touch or non-touch).
It looks like the screen is in bad shape along with the damage to the bezel - you'll need to replace the top half of the system. Figure on $150-200 for the part, plus labor. parts-people.com should have the parts.