function count_up(elname) {
	var elements = mytyGetElementsByName(elname);
	if (elements.length>0) {
		for (var i=0;i<elements.length;i++) {
			elements[i].value++;
		}
	}
}
function count_down(elname) {
	var elements = mytyGetElementsByName(elname);
	if (elements.length>0) {
		for (var i=0;i<elements.length;i++) {
			if (elements[i].value > 1) {
				elements[i].value--;
			}
		}
	}
}

function mytyGetElementsByName(elname) {
	if (navigator.userAgent.indexOf('MSIE')>=0) {
		var collection = [];
		var elements = document.all;
		for (var elcnt=0;elcnt<elements.length;elcnt++) {
			if (elements[elcnt].name && elements[elcnt].name==elname) {
				collection.push(elements[elcnt]);
			}
		}
	} else {
		var collection = document.getElementsByName(elname);
	}
	return collection;
}