function home()
{
//4
var ranNum= Math.round(Math.random() * 5);
if (ranNum == 0){document.write('<img src="http://www.math.brown.edu/images/home_images/banner-home1.png" alt="Brown University Mathematics Department" width="780" height="180" usemap="#Map" />'); } // banner
if (ranNum == 1){document.write('<img src="http://www.math.brown.edu/images/home_images/banner-home2.png" alt="Brown University Mathematics Department" width="780" height="180" usemap="#Map" />'); } // banner2
if (ranNum == 2){document.write('<img src="http://www.math.brown.edu/images/home_images/banner-home3.png" alt="Brown University Mathematics Department" width="780" height="180" usemap="#Map" />'); } // banner3
if (ranNum == 3){document.write('<img src="http://www.math.brown.edu/images/home_images/banner-home4.png" alt="Brown University Mathematics Department" width="780" height="180" usemap="#Map" />'); } // banner4
if (ranNum == 4){document.write('<img src="http://www.math.brown.edu/images/home_images/banner-home5.png" alt="Brown University Mathematics Department" width="780" height="180" usemap="#Map" />'); } // banner5
if (ranNum == 5){document.write('<img src="http://www.math.brown.edu/images/home_images/banner-home6.png" alt="Brown University Mathematics Department" width="780" height="180" usemap="#Map" />'); } // banner5
}