You can specify the tip's opacity.
Specify number as "opacity".
Default value is 1.
new jqTooltip({
selector: "p.opacityTest1",
behavior: "chaseHover",
opacity: 0.3
});
opacity: 0.3
new jqTooltip({
selector: "p.opacityTest2",
behavior: "chaseHover",
opacity: 0.8
});
opacity: 0.8