function startListener2 (field, maxChars, countField) {
listenField = field;
counterField = countField;
maxCount = maxChars;
lastCount = 0;
checkCharCount2();
}
function stopListener2 () {
listenField = null;
counterField = null;
maxCount = 0;
lastCount = 0;
}
function checkCharCount2 () {
var re = /[0-9.]$/; // var re = /\d$/;
var a = listenField.value.match(re);
if (!a&& listenField.value.length>0 ) {
alert('This field should be a number!');
// alert('listenField.value = "'+ listenField.value + '" listenField.value.length = '+listenField.value.length+a);
listenField.value = "";
};
setTimeout("checkCharCount2()", 500);
}