location.href = addOrUpdateQueryString(location.href, 'maxPageSize', '50');
var addOrUpdateQueryString = function(url, name, value) {
var splitted = url.split('?');
var base = splitted[0];
var pairsArray = [];
var isNew = true;
if (splitted.length > 1) {
// it has query string
var qPairsArray = splitted[1].split('&');
for (var i = 0; i < qPairsArray.length; i++) {
var pair = qPairsArray[i].split('=');
var pairName = pair[0];
var pairValue = pair[1];
if (pairName == name) {
pairValue = value;
isNew = false;
}
pairsArray.push({ name: pairName, value: pairValue });
}
}
if (isNew) {
pairsArray.push({ name: name, value: value });
}
return buildUrl(base, pairsArray);
}
function buildUrl(base, pairsArray) {
var newQ = '';
pairsArray.forEach(function (obj) {
var thisPair = obj.name + '=' + obj.value;
newQ = newQ + (newQ == '' ? '' : '&') + thisPair;
});
return base + "?" + newQ;
}