function abre(arquivo){
			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;
					}
				}
			}
		    xmlHttp.onreadystatechange=function() {
				if(xmlHttp.readyState == 1) {
					document.getElementById("quadro1").innerHTML = "<p>&nbsp;</p><p>&nbsp;</p><center>Carregando...<p>&nbsp;</p><img src='img/loading.gif'></center>";
				}
				if(xmlHttp.readyState == 4) {
					document.getElementById("quadro1").innerHTML = xmlHttp.responseText;
				}
		    }
		    xmlHttp.open("GET",arquivo,true);
		    xmlHttp.send(null);
		}




		function abre2(arquivo){
			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 n&atilde;o suporta AJAX.");
						return false;
					}
				}
			}
		    xmlHttp.onreadystatechange=function() {
				if(xmlHttp.readyState == 1) {
					document.getElementById("quadro2").innerHTML = "<p>&nbsp;</p><p>&nbsp;</p><center>Carregando...<p>&nbsp;</p><img src='img/loading.gif'></center>";
				}
				if(xmlHttp.readyState == 4) {
					document.getElementById("quadro2").innerHTML = xmlHttp.responseText;
				}
		    }
		    xmlHttp.open("GET",arquivo,true);
		    xmlHttp.send(null);
		}