//checkval.js
function checkval1(v1){
if(!(v1)){
alert("Error: You must fill the field.\nPlease, make input again...");
return false;}
}
function checkval(v1,v2){
if(!(v1 && v2)){
alert("Error: You must fill all fields: Username and Password to login.\nPlease, make input again...");
return false;}
}
function checkmail(v1){
if(!v1){
alert("Error: You must type your correct email address.\nPlease, make input again...");
return false; } 
if(v1.indexOf('@',1) == -1 || v1.indexOf('.',3)==-1){
alert("Error: You must enter valid email address to send order.\nPlease, make input again...");
return false; } 
}

//checknewacc.js
//firstname, lastname, email, login, passwd, passwd2, url
function checknewacc(v1,v2,v3,v4,v5,v6,v7,v8,v9){

if(!(v1&&v2&&v3&&v4&&v5&&v6&&v7&&v8&&v9)){
alert("Error: You must fill all required fields.\nPlease, make input again...");
return false; } 
if(v3.indexOf('@',1) == -1 || v3.indexOf('.',3)==-1){
alert("Error: You must enter valid email address to send order.\nPlease, make input again...");
return false; } 

if(cdDefEMailasLogin) {
if(v3!=v4) {
alert("Error: email fields does not match");
return false; }}

if(v5!=v6) { 
alert("Error: Passwords must be identical.\nPlease, make input again...");
return false; 
}
if(v5.length<4) { //Here you can change minimal password length: now is 4.
alert("Error: Password must be at least 4 characters.\nPlease, make input again...");
return false; 
}
if(v4==v5) {
alert("Error: Username and Password must be different.\nPlease, make input again...");
return false;
}
if(v7=="http://"||v7.indexOf('.',6)==-1) {
alert("Error: Wrong Url.\nPlease, make input again...");
return false;
}
}