/*
* Extension for jQuery validation
* @since 2009-11-05 19:58:18
* @author Son Nguyen
*/
jQuery.validator.addMethod("alphaNumeric", function(value, element) { 
	return this.optional(element) || value.match(/^[A-Za-z0-9]([a-zA-Z0-9_\-.]| )+[A-Za-z0-9]$/); 
}, "Please use only letters (A-Z), numbers (0-9), dash (-), underscore (_), dot (.) or blank spaces.");