var mes;
mes=Math.round(Math.random() * 5);

if(mes<=1)	
{ 
	document.write('<center><img src="paper/001.jpg" HEIGHT="80" border="1" ></center>');
}
else if(mes<=2)
{ 
	document.write('<center><img src="paper/002.jpg" HEIGHT="80" border="1" ></center>');
}
else if(mes<=3)
{ 
	document.write('<center><img src="paper/003.jpg" HEIGHT="80" border="1" ></center>');
}
else if(mes<=4)
{ 
	document.write('<center><img src="paper/004.jpg" HEIGHT="80" border="1" ></center>');
}
else if(mes<=5)
{ 
	document.write('<center><img src="paper/005.jpg" HEIGHT="80" border="1" ></center>');
}