var myWidth = 0, myHeight = 0;
	if( typeof( window.innerWidth ) == 'number' ) {
		myWidth = window.innerWidth; myHeight = window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth ||document.documentElement.clientHeight ) ) {
		myWidth = document.documentElement.clientWidth; myHeight = document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		myWidth = document.body.clientWidth; myHeight = document.body.clientHeight;
	}
	

// window.alert( 'Width = ' + myWidth + ' and height = ' + myHeight );

  imgwidth = myWidth - 160;
  imgheight = myHeight - 140;


 if (imgwidth<320){

 imgwidth = 320;
 imgheight =  240;
  

 }