function isEmail(email) {
    var re = new RegExp("^['\\w_-]+(\\.['\\w_-]+)*@['\\w_-]+(\\.['\\w_-]+)*\\.[a-zA-Z]{2,4}$")
    return re.test(email)
}
            
function checkSubscribe() {                                
    var someChecked = true
        if (document.subscribe.c_news.checked) {
            someChecked = true
        }                    
        if (document.subscribe.a_news.checked) {
            someChecked = true
        }                    
        if (document.subscribe.b2b_news.checked) {
            someChecked = true
        }                    
        if (!someChecked) {
            alert("Выберите рассылку!")     
            return false
        }   
        if (document.subscribe.email.value != "") {
            if (!isEmail(document.subscribe.email.value)) {
                alert("Введите правильный email!")                          
                document.subscribe.email.focus()        
                return false
            }
        } else {
            alert("Введите email!")
            document.subscribe.email.focus()        
            return false
        }                       
                    
        if (document.subscribe.name.value == "") {
            alert("Введите ФИО!")
            document.subscribe.name.focus()        
            return false
        }
}