var image = new Array(); 
image[0] = '/Portals/0/Skins/Publitronic/Images/header01.jpg' ; 
image[1] = '/Portals/0/Skins/Publitronic/Images/header02.jpg' ; 
image[2] = '/Portals/0/Skins/Publitronic/Images/header03.jpg' ; 
image[3] = '/Portals/0/Skins/Publitronic/Images/header04.jpg' ; 
image[4] = '/Portals/0/Skins/Publitronic/Images/header05.jpg' ; 
var index = Math.floor(Math.random() * image.length); 
document.write('<style type="text/css"> table.skingradient { background-image: url('+ image[index] +');background-repeat:no-repeat;height:250px } </style>');