function GetXMLHttpDiv()
{
    if(navigator.appName == "Microsoft Internet Explorer")
    {
         xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else
    {
        xmlHttp = new XMLHttpRequest();
    }
    return xmlHttp;
}

var xmlRequest = GetXMLHttpDiv();

function abrirPagDiv(tipo, valor, campo)
{    
	if(tipo == 'r')
	{
		var url = valor + '?busca=' + campo.value;	
	}
	else
	{
	    var url = valor;	
	}
	xmlRequest.open('GET',url,true);	
    xmlRequest.onreadystatechange = mudancaEstado;    
	xmlRequest.send(null);    	
	if (xmlRequest.readyState == 1)
    {		
		
		document.getElementById("conteudo").innerHTML = "<img src='/image/carregando.gif' border='0' style='border:0;padding-top:160px;padding-left:130px;'>";
	
    }
	
	return url;
}

function mudancaEstado()
{		
	if (xmlRequest.readyState == 4)
    {       
		
		document.getElementById("conteudo").innerHTML = xmlRequest.responseText;	
    }
}