var ns6 = document.getElementById && !document.all
function restrictinput(maxlength,e,placeholder) {
	if (window.event && event.srcElement.value.length >= maxlength)
		return false
	else if (e.target && e.target == eval(placeholder) && e.target.value.length >= maxlength) {
		var pressedkey=/[a-zA-Z0-9\.\,\/]/ //detect alphanumeric keys
		if (pressedkey.test(String.fromCharCode(e.which)))
			e.stopPropagation()
	}
}

function countlimit(maxlength,e,placeholder) {
	var theform = eval(placeholder)
	var lengthleft = maxlength-theform.value.length
	var placeholderobj = document.all ? document.all[placeholder] : document.getElementById(placeholder)
	if (window.event || e.target && e.target == eval(placeholder)) {
		if (lengthleft < 0)
			theform.value = theform.value.substring(0,maxlength)
		placeholderobj.innerHTML = lengthleft
	}
}

function displaylimit(thename, theid, thelimit) {
	var theform = theid != "" ? document.getElementById(theid) : thename
	var limit_text = '<b><span id="'+theform.toString()+'">'+thelimit+'</span></b>'
	if (document.all || ns6)
		document.write(limit_text)
	if (document.all) {
		eval(theform).onkeypress = function() {return restrictinput(thelimit,event,theform)}
		eval(theform).onkeyup = function() {countlimit(thelimit,event,theform)}
	}	else if (ns6) {
		document.body.addEventListener('keypress', function(event) {restrictinput(thelimit,event,theform)}, true);
		document.body.addEventListener('keyup', function(event) {countlimit(thelimit,event,theform)}, true);
	}
}