function verifyOnlyNumbers( field )  {
	if ( isNaN(field.value) )
		field.value = field.value.substring(0, field.value.length - 1);
}

function setDisplay(content, display) {
	document.getElementById(content).style.display = display;
}	

function setClass(content, className) {
	document.getElementById( content ).setAttribute("class", className);
}	

function addCommas(nStr)  {
	nStr += '';
	x = nStr.split('.');
	x1 = x[0];
	x2 = x.length > 1 ? '.' + x[1] : '';
	var rgx = /(\d+)(\d{3})/;
	while (rgx.test(x1)) {
		x1 = x1.replace(rgx, '$1' + ',' + '$2');
	}
	return x1 + x2;
}