var w=225;
if (sn==2)
	 w=288;
if (sn==3)
	 w=324;
if (sn==4)
	 w=360;
var h=w*448/318;
var lw=' width="'+w+'"';
var lh=' height="'+h+'"';
var la=' alt="How to write a scientific paper"';
var lt=' title="How to write a scientific paper"';
var b=' border="0"';
document.write('<img src="../images/booklet.jpg"'+lw+lh+la+lt+b+'>');