function checkform(fields) {
	var field = fields.split(","); 
	var i = 0;
	var a;
	
	for (i=0;i<=field.length;i++) {
		if(document.getElementById(field[i]).value == "" || document.getElementById(field[i]).value=="0" ) {
			alert('The field ' + field[i] + ' is obligatory');
			document.getElementById(field[i]).focus();
			return false;
		}
	}
}

function showMe(id) {
	var x = document.getElementById(id);
	if(x.style.display=='none') { x.style.display='block'; } else { x.style.display='none'; }
}