//var base_url = document.getElementById('base_url').value;
//var imgPath = document.getElementById('imgPath').value;

//$ = function(id) {return document.getElementById(id);};
function is_email(email){return (/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/i).test(email);}
String.prototype.trim = function () { return this.replace(/(^\s+)|(\s+$)/g, ''); }