function getBrowserWindowParam(param) {
  var browserWidth = 0, browserHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    browserWidth = window.innerWidth;
    browserHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    browserWidth = document.documentElement.clientWidth;
    browserHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    browserWidth = document.body.clientWidth;
    browserHeight = document.body.clientHeight;
  }
    if(param == 'width') return browserWidth;
    if(param == 'height') return browserHeight;
}