var userAgent = navigator.userAgent;                              //取得浏览器的userAgent字符串 
  var isOpera = userAgent.indexOf("Opera") > -1;                         //判断是否Opera浏览器 
  var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器 
  var isEdge = userAgent.indexOf("Edge") > -1 && !isIE;                     //判断是否IE的Edge
  var?isFF?=?userAgent.indexOf("Firefox")>-1                           //判断是否Firefox浏览器??
  var?isSafari?=?userAgent.indexOf("Safari")>-1&&?userAgent.indexOf("Chrome")==-1;        //判断是否Safari浏览器??
  var?isChrome?=?userAgent.indexOf("Chrome")>-1&&?userAgent.indexOf("Edge")==-1;         //判断Chrome浏览器?？

if(isFF){
    console.log('火狐')
    $('#parent').width((windowWidth -320)*(1.01749));
  }else if(isChrome){ 
    console.log('谷歌')
    $('#parent').width((windowWidth -320)*(1.01749));
  }else if(isIE){ 
    console.log('ie10-ie5')
    $('#parent').width((windowWidth -320)*(1.01720));
  }else if(isEdge){
    console.log('edge')
    $('#parent').width((windowWidth -320)*(1.02224));
  }else{
    console.log('ie11和其他浏览器')
    $('#parent').width((windowWidth -320)*(1.01816));
  }