var ttWidth    = 200;
var ttOffsetX      = 10;            // horizontal offset of left-top corner from mousepointer
var ttOffsetY      = -50;           // vertical offset                   "
var text1      = "Photo (c) 2004 Onmark Productions. Used by permission.";
var text2      = "Photo by Dr. Eric Crystal. Used by permission.";
var text3      = "Photo by Dr. Ken Goldberg. Used by permission.";
var text4      = "Photo by Dr. Ken Goldberg. Used by permission.";