/**
 * Global variable to store generic functions and objects.
 */
var APP = {
	/**
	 * Toggle element by ID.
	 */
	swapDisplay: function(id) {
		var elemStyle = document.getElementById(id).style;
		elemStyle.display = elemStyle.display === '' ? 'none' : '';		
	},
	
	/**
	 * NOTE: Every row checkbox must have style class "RowSelector".
	 * check {boolean} whether to select all rows or not.
	 */
	toggleSelectedRows: function(check) {
		var elements = document.getElementsByTagName("input");
		for (i = 0, n = elements.length; i < n; i++) {
			// Get all tags with the specified class name.
			if (elements[i].className === "RowSelector") {
				if (check === true) {
					elements[i].checked = "checked";
				} else {
					elements[i].checked = "";
				}
			}
		}
	}
};