var i =0;
	function request() {
		var url = "http://www.kottoya.com/cgi/ppproxy.cgi?dummy="+ new Date().getTime();

		try {
        	xmlhttp = new XMLHttpRequest();     // Netscape, Firefoxなど
        }
		catch (e) {
			try {
				xmlhttp = new ActiveXObject ("Msxml2.XMLHTTP");     // IE
			}
			catch (e)  {
				try {
					xmlhttp = new ActiveXObject ("Microsoft.XMLHTTP");     // IE
				}
				catch (e) {
					return;
				}
			}
		}
		xmlhttp.onreadystatechange = function() {
			if (xmlhttp.readyState == 4) {
				if (xmlhttp.status == 200) {
					var xml = xmlhttp.responseXML.documentElement;
					
					//	更新日
					var update = xml.getElementsByTagName("update");
					var ele = document.getElementById("divUpdate");
					ele.innerHTML = update[0].firstChild.nodeValue;

					//	金価格
					var preciousmetal = xml.getElementsByTagName('preciousmetal')[0];
					xau  = xml.getElementsByTagName("xau");
					//	金価格(k24)
					for (ii = 0; ii < xau.length; ii++) {
						var karat = xau[ii].getAttribute("karat");
						var ele = document.getElementById("divXAU_" + karat);
						ele.innerHTML = truncateBy100( xau[ii].firstChild.nodeValue );
					}
					//	銀価格
					ele = document.getElementById("divXAG");
					ele.innerHTML = truncateBy10(xml.getElementsByTagName("xag")[0].firstChild.nodeValue);
					//	プラチナ価格
					var xpt  = xml.getElementsByTagName("xpt");
					//	金価格(pt1000)
					for (ii = 0; ii < xpt.length; ii++) {
						var karat = xpt[ii].getAttribute("karat");
						var ele = document.getElementById("divXPT_" + karat);
						ele.innerHTML = truncateBy100(xpt[ii].firstChild.nodeValue);
					}									}
			}
		};
		xmlhttp.open('GET', url, true);
	    xmlhttp.setRequestHeader ("Content-Type","text/xml; charset=utf-8");

	    xmlhttp.send();
    }

	window.onload = function() {
		request();
		setInterval("request", 60*1000*30); //	30分毎に更新
	}

	function truncateBy100( src ) {
		return Math.floor(src /100) * 100;
	}

	function truncateBy10( src ) {
		return Math.floor(src /10) * 10;
	}