.mainwrapper{float:left;width:100%}
#wrapper{background-color:#fff;margin-left:auto;margin-right:auto;max-width:1500px;min-width:1000px;-webkit-box-shadow:0 0 2px 2px rgba(0,0,0,.05);box-shadow:0 0 2px 2px rgba(0,0,0,.05)}
.maincontent{width:1000px;margin-right:auto;margin-left:auto;background-repeat:no-repeat;background-position:right bottom;position:relative;}