//Create a boolean variable to check for a valid Internet Explorer instance.
	var xmlhttp = false;

//Check if we are using IE.
	try {
		//If the Javascript version is greater than 5.
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		//alert ("You are using Microsoft Internet Explorer.");
	} catch (e) {
		//If not, then use the older active x object.
		try {
			//If we are using Internet Explorer.
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		  //alert ("You are using Microsoft Internet Explorder");
		} catch (E) {
			//Else we must be using a non-IE browser.
			xmlhttp = false;
		}
	}

	//If we are using a non-IE browser, create a javascript instance of the object.
	if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
		xmlhttp = new XMLHttpRequest();
	  //	alert ("You are not using Microsoft Internet Explorer");
	}

	function makerequest(serverPage, objID) {

		var obj = document.getElementById(objID);
		xmlhttp.open("GET", serverPage);
		xmlhttp.onreadystatechange = function() {
			if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
				obj.innerHTML = xmlhttp.responseText;
			}
		}
		xmlhttp.send(null);
	}

	//-->
	function mostrar(nombreCapa){
	document.getElementById(nombreCapa).style.display="block";
	}
	function ocultar(nombreCapa){
	document.getElementById(nombreCapa).style.display="none";
	}