function mi(){
var topimage = new Array()
topimage[0] = 'image/topimage01.jpg';
topimage[1] = 'image/topimage02.jpg';
topimage[2] = 'image/topimage03.jpg';
var imagealt = new Array()
imagealt[0] = 'Responding to the needs of doctors and healthcare providers for friendlier endscopy.';
imagealt[1] = 'Our powerful line-up is attained by our desire to provide reliable diagnosis and best treatment.';
imagealt[2] = 'We have pride in our strength to compete globally, grown in Aomoris blessed environment.';
var number = Math.floor(Math.random()*topimage.length)
document.write('<img src="'+topimage[number]+'" alt="'+imagealt[number]+'" width="750" height="160" border="0">')
}