$(document).ready(function(){

	$('#m2_sales_region').bind('change', function() {
		document.form1.country.value = '%';
		document.form1.submit();
	});
	
	$('#m2_sales_country').bind('change', function() {
		document.form1.region.value = '%';
		document.form1.submit();
	});
	
	$('#form1 input:checkbox').bind('click', function() {
		if (!checkChecked()) {
			this.checked = true;
		} else {
			document.form1.submit();
		}
	})
	
});

function checkChecked() {

	var checkedAtAll = false;

	$('#form1 input:checkbox').each( function(i) {
		if (this.checked == true) checkedAtAll = true;
	});
	
	return checkedAtAll;

}