function chamaDiv(valor){
		var xmlHttp;
			try {
			// Firefox, Opera 8.0+, Safari
				xmlHttp=new XMLHttpRequest();
			} 
			catch (e) {
			// Internet Explorer
				try {
					xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
				}
				catch (e) {
					try {
						xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
					}
					catch (e) {
						alert("Seu navegador não suporta AJAX!");
						return false;
					}
				}
			}
		if (valor == 1) {
			document.getElementById('exibe').style.display = 'none';
			xmlHttp.onreadystatechange=function() {
				document.getElementById('tela').style.display = '';
				if (xmlHttp.readyState != 4) {
					document.getElementById('carregando').innerHTML = '<div id=mldform><table width=100% border=0 height=100%><tr><td align=center><div style="height: 50px; background: #FFF"><img src="imagens/carregando.gif"></div></td></tr></table></div>';
				}
				else if (xmlHttp.readyState==4) {
					document.getElementById('carregando').innerHTML = '';
					document.getElementById('formulario').style.display = '';
					document.getElementById('formulario').innerHTML = xmlHttp.responseText;
				}
			}
		xmlHttp.open("GET",'formulario.php',true);
		xmlHttp.send(null);
		}
		else if (valor == 2) {
			document.getElementById('formulario').style.display = 'none';
			document.getElementById('formulario').innerHTML = '';
			document.getElementById('tela').style.display = 'none';
		}
		if (valor == 3) {
			xmlHttp.onreadystatechange=function() {
				document.getElementById('tela').style.display = '';
				if (xmlHttp.readyState != 4) {
					document.getElementById('carregando').innerHTML = '<div id=transp><table width=100% border=0 height=100%><tr><td align=center><div style="height: 50px; background: #FFF"><img src="imagens/carregando.gif"></div></td></tr></table></div>';
				}
				else if (xmlHttp.readyState==4) {
					document.getElementById('carregando').innerHTML = '';
					document.getElementById('formulario').style.display = '';
					document.getElementById('formulario').innerHTML = xmlHttp.responseText;
				}
			}
		xmlHttp.open("GET",'contato.php',true);
		xmlHttp.send(null);
		}

	}