jQuery Grid Plugin - jqGrid

I have attached screenshot of problem with grid.

I wanted to know how to fix the problem of width of jqgrid. let me describe the problem, I assigned 900px width to jqgrid. when i checked this with 600x800 resolution screen, the page managed itself to show with in body of webpage but grid went out of body. I tested the jqgrid's demo's tables by resizing browser, the page managed itself to cope with browser except the jqgrid which went out of body. is there anyway that we resize the browser and see that grid reduces or increases itself according to browser.

the attached image can be found at the url http://imgur.com/oJXh34W 

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Regards,

CM