function formatFloat(src, pos)
{
    return Math.round(src*Math.pow(10, pos))/Math.pow(10, pos);
}

function ajax(ajaxData, success)
{
    $.post(
        "ajax.php",
        ajaxData,
        success
    );
}

function isEmail(email) {
	var patterns = /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/;
	
	if (patterns.test(email))
		return true;
	else
		return false;
}