function checkForm(txt,formFields){
	allOk = true;
	errorMsg = txt + '\n\n';
	for(i=0; i < formFields.elements.length; i++ ){
		if((formFields.elements[i].value == ''  || formFields.elements[i].value == null) && formFields.elements[i].alt != null && formFields.elements[i].alt != ''){
			errorMsg = errorMsg + '- ' + formFields.elements[i].alt + '\n';
			if(allOk == true){
				allOk = false;
			}
		}
	}
	
	if(allOk == true){
		formFields.submit();
	}
	else{
		alert(errorMsg);
	}
}