//Edit the counter/limiter value as your wish
var count = "140";   //Example: var count = "175";
function limiter()
{
	var tex = document.adform.message.value;
	var len = tex.length;
	if(len > count)
	{
        tex = tex.substring(0,count);
        document.adform.message.value =tex;
        return false;
	}
	document.adform.limit.value = count-len;
}