function Tab(url) {
	this.url = url;
	this.loadstatus = "loading";
	var xhr = new XMLHttpRequest();
	var self = this;
	xhr.onreadystatechange = function() {
		if (xhr.readyState == 4 && xhr.status == 200) {
			self.content = "";
			self.longtitle = xhr.responseXML.getElementsByTagName("title")[0].firstChild.nodeValue;
			if (self.longtitle.length >= 14) {
				self.shorttitle = self.longtitle.substr(0, 10);
				if (self.shorttitle.substr(self.shorttitle.length - 1, 1) == " ") {
					self.shorttitle = self.shorttitle.substr(0, self.shorttitle.length - 1);
				}
				self.shorttitle += "…";
			} else {
				self.shorttitle = self.longtitle;
			}
			self.tabcode = '<div class="newtab">';
			self.tabcode += '<div class="tableft"></div>';
			self.tabcode += '<span class="tabmiddle"><span class="label" title="' + self.longtitle + '">' + self.shorttitle + '</span></span>';
			self.tabcode += '<div class="tabright"></div></div>';
			var articles = new Array();
			articles = xhr.responseXML.getElementsByTagName("item");
			var arDiv;
			var selfTab = new Tab(xhr.responseXML.getElementsByTagName("title")[0].firstChild.nodeValue);
			var parsedArticles = new Array();
			for (i = 0; i < articles.length; i++) {
				// create the div for the entire article
				arDiv = document.createElement("div");
				arDiv.id = "article" + i;
				arDiv.className = "article";
				// create the div for the title
				arTiDiv = document.createElement("div");
				arTiDiv.id = "arTitle" + i;
				arTiDiv.className = "arTitle";
				arTiDiv.innerHTML = '<a href="#" onclick="widget.openURL(' + "'" + articles[i].getElementsByTagName("link")[0].firstChild.nodeValue + "'" + ');">' + articles[i].getElementsByTagName("title")[0].firstChild.nodeValue + '</a>';
				arDiv.appendChild(arTiDiv);
				// create the div for the date
				arDate = document.createElement("div");
				arDate.id = "arDate" + i;
				arDate.className = "arDate";
				arDate.innerHTML = "(" + articles[i].getElementsByTagName("pubDate")[0].firstChild.nodeValue + ")";
				arDiv.appendChild(arDate);
				// create the div for the body
				arBodyDiv = document.createElement("div");
				arBodyDiv.id = "arBody" + i;
				arBodyDiv.className = "arBody";
				arBodyDiv.innerHTML = truncate(articles[i].getElementsByTagName("description")[0].firstChild.nodeValue, truncAmount);
				arDiv.appendChild(arBodyDiv);
				
				parsedArticles[i] = arDiv;
			}
			// remove unnecessary padding
			parsedArticles[parsedArticles.length - 1].style.padding = "0px";
			
			for (i in parsedArticles) {
				self.content += parsedArticles[i].outerHTML;
			}
			
			self.loadstatus = "done";
			
			reloadTabs();
		}
	};
	xhr.open("GET", this.url, true);
	xhr.send(null);
}