function CheckNumKeyCode(obj)
{
    var StringSource = "9876543210.-";
    var newText = "";
    for(var i = 0; i < obj.value.length; i++)
    {
        var newChar = obj.value.charAt(i);        
        for (var j = 0; j < StringSource.length; j++)
        {            
            if(newChar == StringSource.charAt(j))
            {
                newText = newText + newChar;
                break;
            }
        }      
                
    }
    obj.value = newText;
}

function TextAreaCharacterCounter(txtId, used, remain, maxCount) 
{
    var fn = document.getElementById(txtId);
    var len = fn.value.length;
    if (len > maxCount) 
    {
        fn.value = fn.value.substring(0, maxCount);
        len = maxCount;
    }
    document.getElementById(used).innerHTML = len;
    document.getElementById(remain).innerHTML = maxCount - len;
}