function changeLanguage(previousLang) {

	var languageSelector = document.getElementById('languageSelector');

	$('#langConfirmModal').modal('show');

	var selectedLanguage = languageSelector.value;

	$('#langModalCancel').on('click', function(e) {
		var previousLanguage = $('#languageId').val();
		$('#languageSelector').val(previousLanguage);
	});

	$('#langModalSave').on('click', function(e) {
		
		// Hide the modal
		$('#langConfirmModal').modal('hide');
		
		// Update the message resolver
		$.post('change-locale.htm', { langId: selectedLanguage },
			// Success callback	
			function(data) {

				var newURL = updateURLParameter(window.location.href, 'langId', selectedLanguage);
				document.getElementById('languageId').value = selectedLanguage;
				
				// Refresh page
				window.location.href = newURL;
			}
		); 

	});

}

function updateURLParameter(url, param, paramVal) {
	var newAdditionalURL = "";
	var tempArray = url.split("?");
	var baseURL = tempArray[0];
	var additionalURL = tempArray[1];
	var temp = "";

	if (additionalURL) {

		tempArray = additionalURL.split("&");

		for (var i = 0; i < tempArray.length; i++) {
			if (tempArray[i].split('=')[0] != param) {
				newAdditionalURL += temp + tempArray[i];
				temp = "&";
			}
		}
	}

	var rows_txt = temp + "" + param + "=" + paramVal;
	return baseURL + "?" + newAdditionalURL + rows_txt;
}