add code to Map.js to allow for the addittion and removal of popups. add a new html file to play around with popups. add a test in the test_Map file for the popup adding/removing

git-svn-id: http://svn.openlayers.org/trunk/openlayers@227 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -42,6 +42,9 @@ OpenLayers.Map.prototype = {
     // Array(OpenLayers.Control)
     controls: null,
 
+    // Array(OpenLayers.Popup)
+    popups: null,
+
     // OpenLayers.LonLat
     center: null,
 
@@ -85,6 +88,8 @@ OpenLayers.Map.prototype = {
         this.addControl( new OpenLayers.Control.PanZoom() );
         this.addControl( new OpenLayers.Control.MouseDefaults() );
 
+        this.popups = new Array();
+
         // always call map.destroy()
         Event.observe(window, 'unload', 
             this.destroy.bindAsEventListener(this));
@@ -142,6 +147,28 @@ OpenLayers.Map.prototype = {
         }
     },
 
+    /** 
+    * @param {OpenLayers.Popup} popup
+    */
+    addPopup: function(popup) {
+        popup.map = this;
+        this.popups.push(popup);
+        var popupDiv = popup.draw();
+        if (popupDiv) {
+            popupDiv.style.zIndex = this.Z_INDEX_BASE['Popup'] +
+                                    this.popups.length;
+            this.viewPortDiv.appendChild(popupDiv);
+        }
+    },
+    
+    /** 
+    * @param {OpenLayers.Popup} popup
+    */
+    removePopup: function(popup) {
+        this.popups.remove(popup);
+        this.viewPortDiv.removeChild(popup.div);
+    },
+    
     /**
     * @return {float}
     */