/*
Form field Limiter script- By Dynamic Drive
For full source code and more DHTML scripts, visit http://www.dynamicdrive.com
This credit MUST stay intact for use
*/

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 = '<span class=style1 id="' + theform.toString() + '"><b>' + lengthleft + '</b> caracteres disponíveis</span>'
	}
}

function displaylimit(theform,thelimit) {
	var limit_text = '<span class=style1 id="' + theform.toString() + '"><b>' + thelimit + '</b> caracteres disponíveis</span>'
	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); 
	}
}