function checkall(id_1,id_2,id_3,id_4,id_5)
	{
    if (document.getElementById(id_1).value=="")
		{
		alert("You forgot your first name!");
		document.getElementById(id_1).focus();
      	document.getElementById(id_1).select();
      	return false;
		}
    if (document.getElementById(id_2).value=="")
		{
		alert("You forgot your last name!");
		document.getElementById(id_2).focus();
      	document.getElementById(id_2).select();
      	return false;
		}
    if (document.getElementById(id_3).value=="")
		{
		alert("You forgot your adress!");
		document.getElementById(id_3).focus();
      	document.getElementById(id_3).select();
      	return false;
		}
    if (document.getElementById(id_4).value=="")
		{
		alert("You forgot your postcode!");
		document.getElementById(id_4).focus();
      	document.getElementById(id_4).select();
      	return false;
		}
	
	if ((document.getElementById(id_5).value.indexOf("@")<1 || document.getElementById(id_5).value.indexOf (".")<1) || document.getElementById(id_5).value=="")
		{
		alert("E-mail is incorrect!");
     	document.getElementById(id_5).focus();
      	document.getElementById(id_5).select();
      	return false;
		}
	return true;
	}

function check_last (pass_1, pass_2)
	{
    if (document.getElementById(pass_1).value=="")
		{
		alert("Passwords must not be empty!");
		document.getElementById(pass_1).focus();
      	document.getElementById(pass_1).select();
      	return false;
		}
    if (document.getElementById(pass_1).value!=document.getElementById(pass_2).value)
		{
		alert("Passwords must be identive!");
		document.getElementById(pass_1).focus();
      	document.getElementById(pass_1).select();
      	return false;
		}
	return true;
	}