var ttWidth    = 200;
var ttOffsetX      = 10;            // horizontal offset of left-top corner from mousepointer
var ttOffsetY      = -50;           // vertical offset                   "
var text1      = "Photo by Peter Waksman. Used by permission.";
var text2      = "Photo by Rob Lifford. Used by permission.";
var text3      = "Photo by Charles Shaw. Used by permission.";
var text4      = "Photo by Richard Boltuck. Used by permission.";