function trim(str) {
	var newstr = str.replace(/^\s*(.+?)\s*$/, "$1");
	if (newstr == " ")
		return "";
	return newstr;
}

function drop_spaces(str) {
	var newstr = trim(str);
	return newstr.replace(/(\s)+/g, ""); 
}

function check_email(email) {
	var template = /^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z])+$/;
	email = drop_spaces(email);
	if (template.test(email))
		return true;
	return false; 
}