/*
 * validateEmail
 * @argument String
 */
function validateEmail(email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = email;
   if(reg.test(address) == false) {      
      return false;
   }
   return true;
}

function trim(str) {
	return str.replace(/^\s+|\s+$/g,"");
}