//定义窗口高、宽的全局变量 
 var winHeight = 0;
 var winWidth = 0;
 var getWinSize = function(){}; //定义获取窗口高宽的空函数
 getWinSize.winWidth = function() //获取窗口宽度
 {
  if (window.innerWidth)//for ie
  {
   winWidth = window.innerWidth;
  }
  else ((document.body) && (document.body.clientWidth))
  {
   winWidth = document.body.clientWidth;
  }
  
  if (document.documentElement && document.documentElement.clientWidth) //通过深入Document内部对body进行检测，获取窗口大小
  {
   winWidth = document.documentElement.clientWidth;
  }
  return winWidth;
 } 
 getWinSize.winHeight = function() //获取窗口高度 
 {
  if (window.innerWidth)//for ie
  {
   winHeight = window.innerHeight;
  }
  else ((document.body) && (document.body.clientHeight))
  {
   winHeight = document.body.clientHeight;
  }
  if (document.documentElement && document.documentElement.clientHeight) //通过深入Document内部对body进行检测，获取窗口大小
  {
   winHeight = document.documentElement.clientHeight;
  }
  return winHeight;
 }
 getWinSize.onresize =function() //窗口高宽的设值函数，根据实际业务修改
 {
  if(getWinSize.winWidth()>=850)
  {
   document.getElementbyId('container').style.width=960+"px";
  }
  else{
   document.getElementbyId('container').style.width=760+"px";
  }
 }
 //调用窗口高宽的设值函数,如果在具体页面重写getWinSize.onresize方法,调用则要放到重写方法的下面执行
 getWinSize.onresize();
 //用window.onresize****窗口高宽的变化,如果在具体页面重写getWinSize.onresize方法,window.onresize****??放在调用方法下面（重新调用一次）
 window.onresize = getWinSize.onresize;