$(document).ready(function() {
	var defs = $('.def');
	for (var i=0;i<defs.length;i++) {
		$(defs[i]).bind('focus', function() {
			if (this.value == $(this).attr('rel')) this.value="";
		});
		$(defs[i]).bind('blur', function() {
			if (this.value == "") this.value=$(this).attr('rel');
			var needs = $('.needed');
			var dis = true;
			for (var j=0;j<needs.length;j++) {
				if (needs[j].value.length==0 || needs[j].value == $(needs[j]).attr('rel')) dis=false;  
			}
			if (dis) {
				$($('.sbm')[0]).attr({'disabled':false});
			} else {
				$($('.sbm')[0]).attr({'disabled':true});
			}
		});

	}

});