$(function(){		
		
	// initialize the send button as disabled
		enableSend(null, true);

	// set the subject select box		
		$('.txSubject2').keyup( function(event){ enableSend(event, true);} );
		$('.txName').keyup( function(event){ enableSend(event, true);} );
		$('.txEMail').keyup( function(event){ enableSend(event, true);} );
		$('.txComments').keyup( function(event){ enableSend(event, true);} );
		
});


function enableSend( evt, bEnable ){
	
	var bIsValid	= bEnable;
		bIsValid	= ($('.txSubject2').val().isEmpty() )? false : bIsValid;
		bIsValid	= ($('.txName').val().isEmpty() )? false : bIsValid;
		bIsValid	= (!$('.txEMail').val().isEmail() )? false : bIsValid;
		bIsValid	= ($('.txComments').val().isEmpty() )? false : bIsValid;
		
	if(!bIsValid){
	
		$('#btnSend').attr("disabled", "disabled");
	}
	else{
	
		$('#btnSend').removeAttr("disabled");
	}
};