function EmailCheck (email) {
    var RegExp = /^((([a-zA-Z]|[0-9]|!|#|$|%|&|'|\*|\+|\-|\/|=|\?|\^|_|`|\{|\||\}|~)+(\.([a-zA-Z]|[0-9]|!|#|$|%|&|'|\*|\+|\-|\/|=|\?|\^|_|`|\{|\||\}|~)+)*)@((((([a-zA-Z]|[0-9])([a-zA-Z]|[0-9]|\-){0,61}([a-zA-Z]|[0-9])\.))*([a-zA-Z]|[0-9])([a-zA-Z]|[0-9]|\-){0,61}([a-zA-Z]|[0-9])\.)[\w]{2,4}|(((([0-9]){1,3}\.){3}([0-9]){1,3}))|(\[((([0-9]){1,3}\.){3}([0-9]){1,3})\])))$/
    if(RegExp.test(email)){
        return true;
    } else {
	alert('Invalid E-mail!');
        return false;
    }
}