function isemail( string )
  {
    var pattern = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
    return pattern.test( string );
  }

  function checkfields( form )
  {
    var missingfields = "";
    switch( true )
    {
	

      case( form.f1.value=="" ):
	    missingfields += "\nİsim (Missing field)";
        break;

	
	  default:
	    break;
    }
	
    switch( true )
    {
	

      case( form.f3.value=="" ):
	    missingfields += "\nEmail adresiniz (Missing field)";
        break;

		
	  case( !isemail(form.f3.value) ):
	    missingfields += "\nEmail adresiniz (Invalid address)";
		break;

	
	  default:
	    break;
    }
	
    switch( true )
    {
	

      case( form.f8.value=="" ):
	    missingfields += "\nGörüntülü ileti #1 (Missing field)";
        break;

	
	  default:
	    break;
    }
	
    switch( true )
    {
	
	
	  default:
	    break;
    }
	
    switch( true )
    {
	
	
	  default:
	    break;
    }
	
    switch( true )
    {
	
	
	  default:
	    break;
    }
	
    switch( true )
    {
	
	
	  default:
	    break;
    }
	
    switch( true )
    {
	

	  case( form.f2.value.length > 1000 ):
	    missingfields += "\nAçıklama (Max chars: 1000)";
		break;
		
	
	  default:
	    break;
    }
	

    if( missingfields != "" )
    {
      alert( "The following fields are incorrect:\n" + missingfields ); return false;
    }

    return true;
  }