if (this._frozenColumnHeaders) {
...
                            var m = u < E; //E is "pivottable content height" and u is "pivot table display rects height"), if content is bigger than display, the if statement is performed, but there is no case to restore the height limit in the other case
                            if (!m) {
//set the height limit

<script><![CDATA[ 
	zk.afterLoad('pivot', function () {
	    var xPivottable = {};
	
	    zk.override(pivot.Pivottable.prototype, xPivottable, {
	        onSize: function(){
                        var A = this.$n(), J = this.$n("cell"), C = J.parentNode, K = C.parentNode, l = this.$n("scroll"), n = this.paging.$n(), D = l.firstChild, o = this.$n("colTitle"), F = this.$n("colTitleFaker"), w = this.$n("dataTitle"), I = jq(A).hasClass(this.getZclass() + "-vscroll"), q;
                        q = Math.max((I ? A.clientWidth + 2 : A.offsetWidth) - w.offsetWidth, 0);
                        if (this._frozenColumnHeaders) {
                            var v = this.$n("wrapper");
                            var G = this.$n("inner");
                            var H = this.$n("dataTitle");
                            var r = this.$n("vscrollbar");
                            var E = G.parentElement.offsetHeight;
                            var B = v.clientHeight;
                            var u = B - H.offsetHeight - this.$n("scroll").offsetHeight;
                            var m = u < E;
                            if (!m) {
                                jq(G).height("auto").width("auto");
                                jq(r.firstChild).height("auto");
                                if (l.style.display === "none") {
                                    r.style.bottom = "auto";
                                    l.style.width = "auto";
                                } else {
                                    r.style.bottom = "auto";
                                    l.style.width = "auto";
                                }
                            }
                        }
	            /* calling original method here*/
	            xPivottable.onSize.apply(this, arguments);
	        }
	    });
	});
	]]></script>