// GLOBAL OBJECT TO CONTAIN VARIOUS COMMON FUNCTIONS
jQuery.extend({
		isBoolean: function(obj) {
	    return typeof obj == 'boolean';
	  },
		isNull: function(obj) {
			return obj === null;
	  },
	  isNumber: function(obj) {
			return typeof obj == 'number' && isFinite(obj);
		},
		isObject: function(obj) {
			return typeof obj == 'object' || this.isFunction(obj);
		},
		isString: function(obj) {
			return typeof obj == 'string';
		},
		isUndefined: function(obj) {
			return typeof obj == 'undefined';
		},
		isDefined: function(obj){
			return (!(!( obj||false )));
		}
});