function criaXMLHttp() {
 if (typeof XMLHttpRequest != "undefined")
    return new XMLHttpRequest();
 else if (window.ActiveXObject){
    var versoes = ["MSXML2.XMLHttp.5.0",
    "MSXML2.XMLHttp.4.0", "MSXML2.XMLHttp.3.0",
    "MSXML2.XMLHttp", "Microsoft.XMLHttp"
    ];
 }
 for (var i = 0; i < versoes.length; i++){
    try{
        return new ActiveXObject(versoes[i]);
    }catch (e) {}
 }
 throw new Error("Seu browser nao suporta AJAX");
}
function goSelect(oSelect){
	var valor = document.getElementById(oSelect).value;

	if(valor != 0) {
		if(oSelect == 'fabricante') { document.location.href='lista_produto.php?cod_marca='+valor; }	
		else if ( oSelect == "categoria" )  { document.location.href='lista_produto.php?cod_categoria='+valor; }			
	}
}
function DaoIndex(acao,div,sql) {
    var divInfo = document.getElementById(div);
    var XMLHttp = criaXMLHttp();
    XMLHttp.open("get", "ajax.php?acao="+acao+"&div="+div+"&idsuper="+sql, true);
    XMLHttp.onreadystatechange = function () {
        if (XMLHttp.readyState == 4)
            if (XMLHttp.status == 200){
                divInfo.innerHTML = XMLHttp.responseText;
            } else {
                divInfo.innerHTML = "Um erro ocorreu" + XMLHttp.statusText;
            }
    };
    XMLHttp.send(null);
}