* {
   -ms-user-select: none; /* IE 10+ */
   -moz-user-select: -moz-none;
   -khtml-user-select: none;
   -webkit-user-select: none;
   user-select: none;
}

.selectable {
   -ms-user-select: auto;
   -moz-user-select: auto;
   -khtml-user-select: auto;
   -webkit-user-select: auto;
   user-select: auto;
}