function trim(b,a){return ltrim(rtrim(b,a),a)}function ltrim(b,a){a=a||"\\s";return b.replace(new RegExp("^["+a+"]+","g"),"")}function rtrim(b,a){a=a||"\\s";return b.replace(new RegExp("["+a+"]+$","g"),"")}function validateEmail(b){var a=/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;if(b.match(a)){return true}else{return false}}function validatePwd(b){var a=/^[a-zA-Z0-9]{4,16}$/;if(b.match(a)){return true}else{return false}};