var mess = new Array(
'<img src="../images/header-graphics/general07.jpg" height="120" width="500" alt="Pittsburgh Technical Institute">',
'<img src="../images/header-graphics/general06.jpg" height="120" width="500" alt="Pittsburgh Technical Institute">',
'<img src="../images/header-graphics/general05.jpg" height="120" width="500" alt="Pittsburgh Technical Institute">',					 
'<img src="../images/header-graphics/general04.jpg" height="120" width="500" alt="Pittsburgh Technical Institute">',
'<img src="../images/header-graphics/general03.jpg" height="120" width="500" alt="Pittsburgh Technical Institute">',
'<img src="../images/header-graphics/general02.jpg" height="120" width="500" alt="Pittsburgh Technical Institute">',
'<img src="../images/header-graphics/general01.jpg" height="120" width="500" alt="Pittsburgh Technical Institute">');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.write(mess[num]);
