var x, y, vrsek, levo, vlevo
x = 3/4*screen.width
y = 3/4*screen.height

vrsek = screen.height-screen.availHeight
levo = 0.08*screen.width

function foto(filename, x, y) {
	var k = 8/10, xn, yn, xs=screen.width, ys=screen.height, levo=((screen.width-x)/2)*0.9;
		if((x >= xs)  &&  (y >= ys)) { 
		    if(ys*x/y > xs) {
			xn = xs*k;
			yn = xn*y/x;
		    }else {
			yn = ys*k;
			xn=yn*x/y;
		    }
		} 
		if((x >= xs)  &&  (y < ys)) {
		    xn = xs*k;
		    yn = xn*y/x;
		} 
		if((x < xs)  &&  (y >= ys)) {
		    yn = ys*k;
		    xn = yn*x/y;
		} 
		if((x < xs)  &&  (y < ys)) {
		    yn=y;
		    xn=x;
		}
		MyPicture=window.open('', 'newwin','width='+(x+20)+', scrollbars=yes, height='+(y+20)+', left='+levo+', top='+vrsek+'');
		MyPicture.document.writeln(
		  '<html><head><title>'+filename+'</title></head>'
 	+'<center><a href='+filename+' onclick=\"window.close()\"><img src=\''+filename+'\' border=0></a></center>'
	+'</body></html>'
	)
MyPicture.document.close();
}