function menu_link(num)
{
	switch(num)

	{

	  case 1:window.location="cataract.htm" ;break;

	  case 2:window.location="multifocal.htm" ;break;

	  case 3:window.location="glaucoma.htm" ;break;

	  case 4:window.location="faq.htm" ;break;

	  case 5:window.location="contact_us.htm" ;break;
	  
 
	}
}