https://www.natureweb.net/Scripts/WebForms/GridView.js

1//CdnPath=http://ajax.aspnetcdn.com/ajax/4.5.1/1/GridView.js
2function GridView() {
3    this.pageIndex = null;
4    this.sortExpression = null;
5    this.sortDirection = null;
6    this.dataKeys = null;
7    this.createPropertyString = GridView_createPropertyString;
8    this.setStateField = GridView_setStateValue;
9    this.getHiddenFieldContents = GridView_getHiddenFieldContents;
10    this.stateField = null;
11    this.panelElement = null;
12    this.callback = null;
13}
14function GridView_createPropertyString() {
15    return createPropertyStringFromValues_GridView(this.pageIndex, this.sortDirection, this.sortExpression, this.dataKeys);
16}
17function GridView_setStateValue() {
18    this.stateField.value = this.createPropertyString();
19}
20function GridView_OnCallback (result, context) {
21    var value = new String(result);
22    var valsArray = value.split("|");
23    var innerHtml = valsArray[4];
24    for (var i = 5; i < valsArray.length; i++) {
25        innerHtml += "|" + valsArray[i];
26    }
27    context.panelElement.innerHTML = innerHtml;
28    context.stateField.value = createPropertyStringFromValues_GridView(valsArray[0], valsArray[1], valsArray[2], valsArray[3]);
29}
30function GridView_getHiddenFieldContents(arg) {
31    return arg + "|" + this.stateField.value;
32}
33function createPropertyStringFromValues_GridView(pageIndex, sortDirection, sortExpression, dataKeys) {
34    var value = new Array(pageIndex, sortDirection, sortExpression, dataKeys);
35    return value.join("|");
36}