// JavaScript Document
var req; 

function loadXMLDoc(url) { 
    req = null; 
    // Procura por um objeto nativo (Mozilla/Safari) 
    if (window.XMLHttpRequest) { 
        req = new XMLHttpRequest(); 
        req.onreadystatechange = processReqChange; 
        req.open("GET", url, true); 
        req.send(null); 
    // Procura por uma versão ActiveX (IE) 
    } else if (window.ActiveXObject) { 
        req = new ActiveXObject("Microsoft.XMLHTTP"); 
        if (req) { 
            req.onreadystatechange = processReqChange; 
            req.open("GET", url, true); 
            req.send(); 
        } 
    } 
} 

function processReqChange() { 
    // apenas quando o estado for "completado" 
	 var decSubTotal 	= 0;
	 var decFrete		= 0;
	 
    if (req.readyState == 4) { 
        // apenas se o servidor retornar "OK" 
        if (req.status == 200) { 
            // procura pela div id="news" e insere o conteudo  
            // retornado nela, como texto HTML 
				document.getElementById('DivFrete').innerHTML = Moeda(req.responseText); 
				document.getElementById('TxtFrete').value = req.responseText; 
				decSubTotal = parseFloat(document.getElementById('TxtSubTotal').value);
				decFrete		= parseFloat(document.getElementById('TxtFrete').value); 
				document.getElementById('DivTotal').innerHTML = Moeda(decSubTotal + decFrete); 
				document.getElementById('BtnCalcularFrete').value = 'Calcular';
				document.getElementById('BtnCalcularFrete').disabled = false;
				document.getElementById('BtnEnviar').disabled = false;
			} else { 
            alert("Houve um problema ao calcular o frete:\n" + req.statusText); 
        } 
    } 
} 
function Moeda(num) {
	num = num.toString().replace(/\$|\,/g,'');
	if(isNaN(num))
		num = "0";
	sign = (num == (num = Math.abs(num)));
	num = Math.floor(num*100+0.50000000001);
	cents = num%100;
	num = Math.floor(num/100).toString();
	if(cents<10)
		cents = "0" + cents;
	for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
		num = num.substring(0,num.length-(4*i+3))+'.' + num.substring(num.length-(4*i+3));
	return (((sign)?'':'-')  + num + ',' + cents);
}
function CalcularFrete($strGet, $strCepComplemento) { 
	document.getElementById('BtnCalcularFrete').value = 'Conectando com os correios para calcular o frete...';
	document.getElementById('BtnCalcularFrete').disabled = true;
	loadXMLDoc("frm_calcular_frete_xml.php?TxtCep="+$strGet+"&TxtCepComplemento="+$strCepComplemento); 

}