function is_empty(element){
	var error = 0;
	if(element.value==""){
		if(element.getAttribute('reply')){
			document.getElementById(element.getAttribute('name')+'_error').innerHTML = element.getAttribute('reply');
		}else{
			document.getElementById(element.getAttribute('name')+'_error').innerHTML = "Fild <b>'"+element.getAttribute('name')+"'</b> is empty!";
		}
		document.getElementById(element.getAttribute('name')+'_error').style.height = "14px";
		error = 1;
	}
	return error;
}
function check_fild(element){
	var reply = 0;
	if(element.getAttribute('type_check') == "is_empty"){
		reply = is_empty(element);
	}
	return reply;
}
function check_valid(id,form){
	var group = document.getElementById(id);
	var InpF = group.getElementsByTagName('INPUT');
	var no_submit = 0;
	var ans = 0;
	for (var i=0; i<InpF.length; i++){
		if(InpF[i].getAttribute('check') == 1){
			document.getElementById(InpF[i].getAttribute('name')+'_error').style.height = "0px";
			if(InpF[i].getAttribute('type_check')){
				var ans = check_fild(InpF[i]);
				if(no_submit==0){
					no_submit = ans;
				}
			}
		}
	}
	if(no_submit == 0){
		document.getElementById(form).submit();
	}
}