function check(){
	if (document.regis.user.value == "" || !isNaN(document.regis.user.value)){
		alert("your username is incorrect");
		return false;
		}
	if (document.regis.pass.value == ""){
		alert("your username is incorrect");
		return false;
		}
	}
	
function test_contact(){
	var email1 = "^[a-z A-Z 0-9 . _]+@[a-z A-Z 0-9 . _]+\.[a-z A-Z 0-9 . _]+\.*[a-z A-Z 0-9 . _]*";
	if(document.contact.full_name.value == "" || !isNaN(document.contact.full_name.value)){
		alert("your name must be alphabetic");
		return false;
		}
	if(document.contact.country.value != "" && !isNaN(document.contact.country.value)){
		alert("your name must be alphabetic");
		return false;
		}
	if (document.contact.email.value == "" || email1.match(document.contact.email.value)){
		alert("your email must not be empty or must be a valid email");
		return false;
		}
	if (document.contact.note.value == "" || !isNaN(document.contact.note.value)){
		alert("your note must not be empty and be alphabetic");
		return false;
		}
	}

function test_subs(){
	var email1 = "^[a-z A-Z 0-9 . _]+@[a-z A-Z 0-9 . _]+\.[a-z A-Z 0-9]+\.*[a-z A-Z 0-9]*";
	if (document.subs.first_name.value == "" || !isNaN(document.subs.first_name.value)){
		alert("your name must not be empty and must be alphabetic");
		return false;
		}
	if (document.subs.last_name.value == "" || !isNaN(document.subs.last_name.value)){
		alert("your lastname is incorrect");
		return false;
		}
	if (document.subs.profession.value == "" || !isNaN(document.subs.profession.value)){
		alert("your profession is incorrect");
		return false;
		}
	if (document.subs.country.value == "" || !isNaN(document.subs.country.value)){
		alert("your country must not be empty and not numerical");
		return false;
		}
	if (document.subs.city.value == "" || !isNaN(document.subs.city.value)){
		alert("your city must not be empty and not numerical");
		return false;
		}
	if (document.subs.region.value == "" || !isNaN(document.subs.region)){
		alert("your region must not be empty and not numerical");
		return false;
		}
	if (document.subs.street.value == "" || !isNaN(document.subs.street.value)){
		alert("your street must not be empty and not numerical");
		return false;
		}
	if (document.subs.building.value == "" || !isNaN(document.subs.building.value)){
		alert("your building must not be empty and not numerical");
		return false;
		}
	if (document.subs.flor.value == ""){
		alert("your floor must not be empty");
		return false;
		}
	if (document.subs.zip.value == "" || isNaN(document.subs.zip.value)){
		alert("Enter your zip code and must be numeric");
		return false;
		}
	if (document.subs.email.value == "" || email1.match(document.subs.email.value)){
		alert("your email must not be empty and must be valid");
		return false;
		}
	if (document.subs.phone.value == "" || isNaN(document.subs.phone.value)){
		alert("Enter your phone number correctly");
		return false;
		}
	if (document.subs.code.value == "" || isNaN(document.subs.code.value)){
		alert("Enter your code number correctly");
		return false;
		}
}
		
function test_forgot(){
	var email1 = "%[a-z A-Z 0-9 . _]+@[a-z A-Z 0-9 . _]+\.[a-z A-Z 0-9]+\.*[a-z A-Z 0-9]*";
	if (document.forgot.user_name.value == "" || !isNaN(document.forgot.user_name.value)){
		alert("your name must not be empty and not numerical");
		return false;
		}
	if (document.forgot.first_pass.value == "" || document.forgot.second_pass.value == "" && document.forgot.first_pass.value == document.forgot.second_pass.value){
		alert("your pass must be identical");
		return false;
		}
	if (document.forgot.email.value == "" || email1.match(document.forgot.email.value)){
		alert("your email must not be empty and must be valid email");
		return false;
		}
	}
	
function test_registration(){
	var email1 = "^[a-z A-Z 0-9 . _]+@[a-z A-Z 0-9 . _]+\.[a-z A-Z 0-9]+\.*[a-z A-Z 0-9]*";
	if (document.regist.first_name.value == "" || !isNaN(document.regist.first_name.value)){
		alert("your name must not be empty and not numerical");
		return false;
		}
	if (document.regist.last_name.value == "" || !isNaN(document.regist.last_name.value)){
		alert("your name must not be empty and not numerical");
		return false;
		}
	if (document.regist.user_name.value == "" || !isNaN(document.regist.user_name.value)){
		alert("your User name must not be empty and not numerical");
		return false;
		}
	if (document.regist.pass.value == ""){
		alert("your password must not be empty");
		return false;
		}
	if (document.regist.profession.value == "" || !isNaN(document.regist.profession.value)){
		alert("your profession must not be empty and not numerical");
		return false;
		}
	if (document.regist.country.value == "" || !isNaN(document.regist.country.value)){
		alert("your country must not be empty and not numerical");
		return false;
		}
	if (document.regist.zip.value == "" || isNaN(document.regist.zip.value)){
		alert("Enter your zip code correctly");
		return false;
		}
	if (document.regist.email.value == "" || email1.match(document.regist.email.value)){
		alert("your email must not be empty and must be valid");
		return false;
		}
	if (document.regist.phone.value == "" || isNaN(document.regist.phone.value)){
		alert("Enter your phone number correctly");
		return false;
		}
	if (document.regist.code.value == "" || isNaN(document.regist.code.value)){
		alert("Enter your code number correctly");
		return false;
		}
}