function checkUserNameAvailability(userNameIn, url, w, h, name)
{

child = window.open(url+'&userName='+userNameIn, name,'toolbar=no,resizable=yes,directories=no,status=no,scrollbars=yes,resize=no,menubar=no,width='+w+',height='+h);

}




function checkNewUserRegistration()
{



	

	// checking that the firstName is not empty:
	
	if(document.newUserRegistrationForm.elements[1].value == "")
     	{
      		alert("Please enter your first name");
      		document.newUserRegistrationForm.elements[1].focus();
      		document.newUserRegistrationForm.elements[1].select(); 
      		return false;
     	}
     
     
     
	// checking that the last name is not empty:
	
	else if(document.newUserRegistrationForm.elements[2].value == "")
     	{
      		alert("Please enter your last name");
      		document.newUserRegistrationForm.elements[2].focus();
      		document.newUserRegistrationForm.elements[2].select(); 
      		return false;
     	}
     
     
          
     
	// checking that the username is not empty
	
	else if(document.newUserRegistrationForm.elements[3].value == "")
     	{
      		alert("Please enter the username you wish to have. It should be at least 4 characters long.");
      		document.newUserRegistrationForm.elements[3].focus();
      		document.newUserRegistrationForm.elements[3].select(); 
      		return false;
     	}
     
     

	// verifying the password
	
	else if(document.newUserRegistrationForm.elements[4].value=="" || document.newUserRegistrationForm.elements[4].value.indexOf(" ") != -1)
	{
	
		alert("Please enter a bit longer password for your protection");
		document.newUserRegistrationForm.elements[4].select();
		document.newUserRegistrationForm.elements[4].focus();
		return false;
	}


	// checking that the email is correct:
	
	else if(document.newUserRegistrationForm.elements[6].value.indexOf(".") == -1 || document.newUserRegistrationForm.elements[6].value.indexOf("@") == -1 || document.newUserRegistrationForm.elements[6].value == "" || document.newUserRegistrationForm.elements[6].value.indexOf(",") != -1 || document.newUserRegistrationForm.elements[6].value.indexOf(" ") != -1 || document.newUserRegistrationForm.elements[6].value.indexOf(":") != -1 || document.newUserRegistrationForm.elements[6].value.indexOf(";") != -1)
     	{
      		alert("Please enter a valid email address");
      		document.newUserRegistrationForm.elements[6].focus();
      		document.newUserRegistrationForm.elements[6].select(); 
      		return false;
     	}


	// checking that the email address finishes with "fh-offenburg.de" if they selected the study program:
		
	else if((document.newUserRegistrationForm.elements[7].value!="") && document.newUserRegistrationForm.elements[6].value.indexOf("fh-offenburg.de") == -1)
     	{
      		alert("Please enter your Offenburg University Email address or deselect the study program");
      		document.newUserRegistrationForm.elements[6].focus();
      		document.newUserRegistrationForm.elements[6].select(); 
      		return false;
     	}

	
	

	else
	{
	
		
		return true;
		
	}




}