var projects_01 = '<a href="projects.html"><img src="http://www.nettech.com/calcityplumbing/images/cp-04.jpg"/></a>';

var projects_02 = '<a href="projects.html"><img src="http://www.nettech.com/calcityplumbing/images/cp-16.jpg"/></a>';

var projects_03 = '<a href="projects.html"><img src="http://www.nettech.com/calcityplumbing/images/cp-12.jpg"/></a>';

var projects_04 = '<a href="projects.html"><img src="http://www.nettech.com/calcityplumbing/images/cp-11.jpg"/></a>';

var projects_05 = '<a href="projects.html"><img src="http://www.nettech.com/calcityplumbing/images/cp-05.jpg"/></a>';


var mess = new Array(projects_01,projects_02,projects_03,projects_04);


var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);