I want to postdata with value of a cookie

mycode

sortname : $.cookie(grid+"sidx")? $.cookie(grid+"sidx") : 'code_sni',
search : $.cookie(grid+"_search")? $.cookie(grid+"_search") : false,
postData:$.cookie(grid+"postData")? {$.cookie(grid+"postData")} : {},
..
$.cookie(grid+"page",postData.page, { expires: 1 });