/****************************************************************************************
											LIMITE DE CARACTERES DIGITADOS
****************************************************************************************/
/*
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
Adaptado para uso próprio por Marcos Antonio Oliveira
*/
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 LimiteCaracteres(thename, theid, thelimit){
	var theform = theid != "" ? document.getElementById(theid) : thename;

	// Caso o formulário esteja sendo recarregado com valores digitados na caixa de texto
	var qtdcarac = eval(theform).value.length;
	var vlrini = qtdcarac > 0 ? thelimit - qtdcarac : thelimit;
	
	var limit_text='<br /><b><span style="background-color:#eeeedd; padding:1px 4px 2px 4px; font-family:Verdana, sans-serif; font-size:10px"><span id="'+theform.toString()+'" style="font-weight:bold; color:#f00;">' + vlrini + '</span></b> caracteres</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); 
	}
}