var mess = new Array('<img src=\"tree_images\\1.jpg\" style="width: 75%; height: 75%;" alt=\"Coast Live Oak\">',
'<img src=\"tree_images\\2.jpg\" style="width: 75%; height: 75%;" alt=\"Coast Live Oak\">',
'<img src=\"tree_images\\3.jpg\" style="width: 75%; height: 75%;" alt=\"Coast Live Oak\">',
'<img src=\"tree_images\\4.jpg\" style="width: 75%; height: 75%;" alt=\"Sweetgum\">',
'<img src=\"tree_images\\5.jpg\" style="width: 75%; height: 75%;" alt=\"Sweetgum\">',
'<img src=\"tree_images\\6.jpg\" style="width: 75%; height: 75%;" alt=\"Sweetgum\">',
'<img src=\"tree_images\\7.jpg\" style="width: 75%; height: 75%;" alt=\"Blue Jacaranda\">',
'<img src=\"tree_images\\8.jpg\" style="width: 75%; height: 75%;" alt=\"Blue Jacaranda\">',
'<img src=\"tree_images\\9.jpg\" style="width: 75%; height: 75%;" alt=\"Blue Jacaranda\">',
'<img src=\"tree_images\\10.jpg\" style="width: 75%; height: 75%;" alt=\"Mediterranean cypress\">',
'<img src=\"tree_images\\11.jpg\" style="width: 75%; height: 75%;" alt=\"Mediterranean cypress\">');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);