//using onKeyPress="onlyDigits();
function onlyDigits(e) 
{
	var isIE = document.all?true:false;
	var isNS = document.layers?true:false;

	var _ret = true;
	if (isIE) {
	if (window.event.keyCode < 46 || window.event.keyCode > 57) {
	window.event.keyCode = 0;
	_ret = false;
	}
	}
	if (isNS) {
	if (e.which < 46 || e.which > 57) {
	e.which = 0;
	_ret = false;
	}
	}
	return (_ret); 
}