Patches Telerik Tooltip control in IE10 which fails with Javascript error

telerik-patch.js

/*
 * Patches Telerik Tooltip control in IE10 which fails with this Javascript error:
 *
 *   SCRIPT5007: Unable to get property 'documentElement' of undefined or null reference 
 *   Telerik.Web.UI.WebResource.axd, line 151 character 2
 *
 * Solution is to redefine the bugged function and replace a.document.documentElement
 * with (a.document || a.ownerDocument).documentElement, thus avoiding a paid upgrade.
 *
 * To use, include this script after Telerik's.
 *
 *
 * Alternate solution if unable to load this Javascript file is to force the browser in
 * IE9 mode with META:
 *   <meta http-equiv="X-UA-Compatible" content="IE=9">
 * In some cases that is not enough. Fallback is to ask users to manually go in IE9 mode.
 *
 */
window.$telerik.getLocation = window.TelerikCommonScripts.getLocation = Telerik.Web.CommonScripts.getLocation = function (a) {
        var v = a && a.ownerDocument ? a.ownerDocument : document;
        if (a === v.documentElement) {
            return new Sys.UI.Point(0, 0);
        }
        if (Sys.Browser.agent == Sys.Browser.InternetExplorer) {
            if (a.window === a || a.nodeType === 9 || !a.getClientRects || !a.getBoundingClientRect || a.parentElement == null) {
                return new Sys.UI.Point(0, 0);
            }
            var F = a.getClientRects();
            if (!F || !F.length) {
                return new Sys.UI.Point(0, 0);
            }
            var j = F[0];
            var G = 0;
            var z = 0;
            var y = false;
            try {
                y = a.ownerDocument.parentWindow.frameElement;
            } catch (f) {
                y = true;
            }
            if (y) {
                var c = a.getBoundingClientRect();
                if (!c) {
                    return new Sys.UI.Point(0, 0);
                }
                var D = j.left;
                var s = j.top;
                for (var l = 1; l < F.length; l++) {
                    var o = F[l];
                    if (o.left < D) {
                        D = o.left;
                    }
                    if (o.top < s) {
                        s = o.top;
                    }
                }
                G = D - c.left;
                z = s - c.top;
            }
			/* var C = a.document.documentElement; */
            var C = (a.document || a.ownerDocument).documentElement;
            var e = 0;
            if (Sys.Browser.version < 8 || $telerik.quirksMode) {
                var I = 1;
                if (y && y.getAttribute) {
                    var g = y.getAttribute("frameborder");
                    if (g != null) {
                        I = parseInt(g, 10);
                        if (isNaN(I)) {
                            I = g.toLowerCase() == "no" ? 0 : 1;
                        }
                    }
                }
                e = 2 * I;
            }
            var M = new Sys.UI.Point(j.left - e - G + $telerik.getCorrectScrollLeft(C), j.top - e - z + C.scrollTop);
            if ($telerik.quirksMode) {
                M.x += $telerik.getCorrectScrollLeft(document.body);
                M.y += document.body.scrollTop;
            }
            return M;
        }
        var M = Sys.UI.DomElement.getLocation(a);
        if ($telerik.isOpera) {
            var d = $telerik.getCurrentStyle(a, "display");
            if (d != "inline") {
                var E = a.parentNode;
            } else {
                var E = a.offsetParent;
            }
            while (E) {
                var b = E.tagName.toUpperCase();
                if (b == "BODY" || b == "HTML") {
                    break;
                }
                if (b == "TABLE" && E.parentNode && E.parentNode.style.display == "inline-block") {
                    var J = E.offsetLeft;
                    var h = E.style.display;
                    E.style.display = "inline-block";
                    if (E.offsetLeft > J) {
                        M.x += E.offsetLeft - J;
                    }
                    E.style.display = h;
                }
                M.x -= $telerik.getCorrectScrollLeft(E);
                M.y -= E.scrollTop;
                if (d != "inline") {
                    E = E.parentNode;
                } else {
                    E = E.offsetParent;
                }
            }
        }
        var q = Math.max(v.documentElement.scrollTop, v.body.scrollTop);
        var t = Math.max(v.documentElement.scrollLeft, v.body.scrollLeft);
        if (!$telerik.isOpera) {
            var K = a;
            while (K) {
                if ($telerik.getCurrentStyle(K, "position") == "fixed") {
                    M.y += q;
                    M.x += t;
                    q = 0;
                    t = 0;
                    break;
                }
                K = K.offsetParent;
            }
        }
        if ($telerik.isSafari) {
            if (q > 0 || t > 0) {
                var A = v.documentElement.getElementsByTagName("form");
                if (A && A.length > 0) {
                    var k = Sys.UI.DomElement.getLocation(A[0]);
                    if (k.y && k.y < 0) {
                        M.y += q;
                    }
                    if (k.x && k.x < 0) {
                        M.x += t;
                    }
                } else {
                    var n = a.parentNode,
                        m = false,
                        H = false;
                    while (n && n.tagName) {
                        var B = Sys.UI.DomElement.getLocation(n);
                        if (B.y < 0) {
                            m = true;
                        }
                        if (B.x < 0) {
                            H = true;
                        }
                        n = n.parentNode;
                    }
                    if (m) {
                        M.y += q;
                    }
                    if (H) {
                        M.x += t;
                    }
                }
            }
            var E = a.parentNode;
            var u = null;
            var w = null;
            while (E && E.tagName.toUpperCase() != "BODY" && E.tagName.toUpperCase() != "HTML") {
                if (E.tagName.toUpperCase() == "TD") {
                    u = E;
                } else {
                    if (E.tagName.toUpperCase() == "TABLE") {
                        w = E;
                    } else {
                        var p = $telerik.getCurrentStyle(E, "position");
                        if (p == "absolute" || p == "relative") {
                            var x = $telerik.getCurrentStyle(E, "borderTopWidth", 0);
                            var L = $telerik.getCurrentStyle(E, "borderLeftWidth", 0);
                            M.x += parseInt(x);
                            M.y += parseInt(L);
                        }
                    }
                }
                var p = $telerik.getCurrentStyle(E, "position");
                if (p == "absolute" || p == "relative") {
                    M.x -= E.scrollLeft;
                    M.y -= E.scrollTop;
                }
                if (u && w) {
                    M.x += parseInt($telerik.getCurrentStyle(w, "borderTopWidth"), 0);
                    M.y += parseInt($telerik.getCurrentStyle(w, "borderLeftWidth", 0));
                    if ($telerik.getCurrentStyle(w, "borderCollapse") != "collapse") {
                        M.x += parseInt($telerik.getCurrentStyle(u, "borderTopWidth", 0));
                        M.y += parseInt($telerik.getCurrentStyle(u, "borderLeftWidth", 0));
                    }
                    u = null;
                    w = null;
                } else {
                    if (w) {
                        if ($telerik.getCurrentStyle(w, "borderCollapse") != "collapse") {
                            M.x += parseInt($telerik.getCurrentStyle(w, "borderTopWidth", 0));
                            M.y += parseInt($telerik.getCurrentStyle(w, "borderLeftWidth", 0));
                        }
                        w = null;
                    }
                }
                E = E.parentNode;
            }
        }
        return M;
    };