1315: Download button for MWW instance (iframe based)

Task-Url: https://pm.winseda.de/issues/1315

js/item/item.js

@@ -109,5 +109,23 @@ ResultItem.prototype.loadData = function(dataType, containerSelector, contentSel
 		    error: __util.processServerError
 		});
 	}
+};
 
+ResultItem.prototype.downloadData = function(format, model) {
+	var _this = this; 
+	$.ajax({
+	    url: window.location.href + "download?format=" + format + "&type=" + model,
+	    type: "GET",
+	    dataType: "json",
+	    success: function(data) { 
+	    	if ( window.location !== window.parent.location ) {
+	    		// The page is in an iframe
+	    		window.parent.postMessage(data, '*');
+	    	} else {
+	    		// The page is not in an iframe
+	    		console.log(data);
+	    	}
+	    },
+		error: __util.processServerError
+	});
 };