function createXMLHttpRequest() {
	if(window.ActiveXObject) {
		try {
			xmlObj = new ActiveXObject("Msxml3.XMLHTTP");
		} catch (e) {
			try {
				xmlObj = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try {
					xmlObj = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e) {
				}
			}
		}
	} else if(window.XMLHttpRequest) {
		xmlObj = new XMLHttpRequest();
		if (xmlObj.overrideMimeType) {
			xmlObj.overrideMimeType('text/xml');
		}
	}
}


function change1(content) {
	createXMLHttpRequest();
	class_name = document.change_content.class_name.value;
	location_name = document.change_content.location.value;
    url = "/dungeon/change_content/" + content + "/" + class_name + "/" + location_name + ".html";
    xmlObj.onreadystatechange = handleStateChange1;
    xmlObj.open("GET", url, true);
    xmlObj.send(null);
}

function handleStateChange1() {
	if(xmlObj.readyState == 1){
      document.getElementById('imgProgress').style.display="";
	}
    if(xmlObj.readyState == 4) {
        if(xmlObj.status == 200) {
        	var arr = new Array();
        	div_text = xmlObj.responseText;
        	document.getElementById("ajax_table").innerHTML = div_text;
        	document.getElementById('imgProgress').style.display="none";
        }
    }
}

function change2(content) {
	createXMLHttpRequest();
	instance_name = document.change_content.instance.value;
	location_name = document.change_content.location.value;
    url = "/dungeon/change_content/" + instance_name + "/" + content + "/" + location_name + ".html";
    xmlObj.onreadystatechange = handleStateChange1;
    xmlObj.open("GET", url, true);
    xmlObj.send(null);
}

function change3(content) {
	createXMLHttpRequest();
	instance_name = document.change_content.instance.value;
	class_name = document.change_content.class_name.value;
    url = "/dungeon/change_content/" + instance_name + "/" + class_name + "/" + content + ".html";
    xmlObj.onreadystatechange = handleStateChange1;
    xmlObj.open("GET", url, true);
    xmlObj.send(null);
}