var ttWidth    = 150;
var ttOffsetX      = 5;            // horizontal offset of left-top corner from mousepointer
var ttOffsetY      = -80;           // vertical offset                   "
var text1      = "Photo courtesy Carolyn Blattel-Britton. Used by permission.";
var text2      = "Photo courtesy sunjye. Used by permission.";
var text3      = "Photo courtesy Heinrich Unser. Used by permission.";
var text4      = "Photo courtesy Albalonee Al. Used by permission.";
var text5      = "Photo by Andrew Blake. Used by permission.";