local function showTooltip(self, linkData)
    local linkType = string.split(":", linkData)
    if linkType == "item"
    or linkType == "spell"
    or linkType == "enchant"
    or linkType == "quest"
    or linkType == "talent"
    or linkType == "glyph"
    or linkType == "unit"
    or linkType == "achievement" then
        GameTooltip:SetOwner(self, "ANCHOR_CURSOR")
        GameTooltip:SetHyperlink(linkData)
        GameTooltip:Show()
    end
end

local function hideTooltip()
    GameTooltip:Hode()
end

local function setOrHookHandler(frame, script, func)
    if frame:GetScript(script) then
        frame:HookScript(script, func)
    else
        frame:SetScript(script, func)
    end
end

for i = 1, NUM_CHAT_WINDOWS do
    local frame = getglobal("ChatFrame"..i)
    if frame then
        setOrHookHandler(frame, "OnHyperlinkEnter", showTooltip)
        setOrHookHandler(frame, "OnHyperlinkLeave", hideTooltip)
    end
end