image11 = new Image();
image11.src = "images/about_mission_on.gif";
image12 = new Image();
image12.src = "images/about_why_on.gif";
image13 = new Image();
image13.src = "images/about_manage_on.gif";
image14 = new Image();
image14.src = "images/about_careers_on.gif";
image15 = new Image();
image15.src = "images/about_contact_on.gif";