Qualtrics.SurveyEngine.addOnload(function()
{
var a = document.getElementById("QR~QID135");
document.getElementById("QR~QID135").setAttribute("onFocus","javascript:revealToolTip('QID135','tooltip12')");
document.getElementById("QR~QID135").setAttribute("onBlur","javascript:hideToolTip('tooltip12')");
Best answer by TomG
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