//Funçoes de validacao

function somenteNumeros() {
	var tecla = event.keyCode;
	if ((tecla == 8) || (tecla > 47 && tecla < 58) ) // numeros de 0 a 9
		return true;
	else {		
		 event.keyCode = 0; //return false;	
	}
}

function TABEnter(oEvent){
  var oEvent = (oEvent)? oEvent : event;
  if(oEvent.keyCode==13)
    oEvent.keyCode = 9;
}


//Função para auto-tabulação - Copiado por Marco Aurélio F. Rêgo em 03/01/2005 Original: Cyanide_7 (leo7278@hotmail.com) 
// Web Site: http://members.xoom.com/cyanide_7 --> 
// The JavaScript Source!! http://javascript.internet.com --> 


function autoTab(input,len, e) { 
	var isNN = (navigator.appName.indexOf("Netscape")!=-1); 
	var keyCode = (isNN) ? e.which : e.keyCode; 
	var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46]; 
	if(input.value.length >= len && !containsElement(filter,keyCode)) { 
		input.value = input.value.slice(0, len); 
		input.form[(getIndex(input)+1) % input.form.length].focus(); 
	} 

	function containsElement(arr, ele) { 
		var found = false, index = 0; 
		while(!found && index < arr.length) 
			if(arr[index] == ele) 
				found = true; 
			else 
				index++; 
			return found; 
	} 

	function getIndex(input) { 
		var index = -1, i = 0, found = false; 
		while (i < input.form.length && index == -1) 
			if (input.form[i] == input)index = i; 
			else i++; 
			return index; 
	} 
	return true; 
}