function emailcheck(cur)
{
var string1=cur.email.value
if (string1.indexOf("@")==-1)
{
alert("Nice try retard, but that email address is not valid! You probably mistyped your email address - for example, the @ sign was forgotten or you forgot the . before com/net or a comma in place of a dot. Please try again, you can do it.")
return false
}
}