var winW=0, winH=0, winR=0, imgW=0, imgH=0, imgR=0;
if( typeof( window.innerWidth ) == 'number' ) {
  winW = window.innerWidth;    //Non-IE
  winH = window.innerHeight;
} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
  winW = document.documentElement.clientWidth;    //IE 6+ in 'standards compliant mode'
  winH = document.documentElement.clientHeight;
} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
  winW = document.body.clientWidth;    //IE 4 compatible
  winH = document.body.clientHeight;
}

winW = (winW - 185);
winH = (winH - 40);
winR = winW / winH;