$(document).ready(function(){
var maxWidth = 1200; // max width
var minWidth = 999; // min width
var selector = $("#mainWraper"); // selector

var windowWidthTemp = 0;
var windowWidth = 0;


if($.browser.msie){
 mmwidth();
 $(window).resize(function(){
        windowWidth = $(window).width();
        if (windowWidth != windowWidthTemp){
         windowWidthTemp = windowWidth;
         mmwidth();
        }
       });
}

function mmwidth(){
  $(selector).css({width:100+"%"});
  bodyWidth = $(window).width();
 
  if (bodyWidth < minWidth){
   $(selector).width(minWidth);
  }else {
   if (bodyWidth > maxWidth){
    $(selector).width(maxWidth);
   } else {
    $(selector).width(100+"%");
   }
  }
}
});