// JavaScript Document
function ShiftControl() {
    }
    ShiftControl.prototype = new GControl();

    // Creates a one DIV for each of the buttons and places them in a container
    // DIV which is returned as our control element. We add the control to
    // to the map container and return the element for the map class to
    // position properly.
    ShiftControl.prototype.initialize = function(map) {
      var container = document.createElement("div");
	
      //var zoomInDiv = document.createElement("div");
	  
	 var image01= new Image();
	image01.src="images/large.png"
      this.setButtonStyle_(container);
      container.appendChild(image01);
      //zoomInDiv.appendChild(document.createTextNode("div"));
      GEvent.addDomListener(container, "click", function() {
			undoshift();
			map.addOverlay(brownoverlay);
			brownoverlay.setOpacity(5);
			ew.hide();
			ew1.hide();
			//if(encodedPolygon!=null){
			//	map.removeOverlay(encodedPolygon);
			//}
			
	  });
      map.getContainer().appendChild(container);
      return container;
    }

    // By default, the control will appear in the top left corner of the
    // map with 7 pixels of padding.G_ANCHOR_TOP_RIGHT
    ShiftControl.prototype.getDefaultPosition = function() {
      return new GControlPosition(G_ANCHOR_TOP_RIGHT, new GSize(0, 0));
    }

    // Sets the proper CSS for the given button element.
    ShiftControl.prototype.setButtonStyle_ = function(button) {
      //button.style.textDecoration = "underline";
      //button.style.color = "#0000cc";
      button.style.backgroundColor = "transparent";
      //button.style.border = "1px solid #003366";
      //button.style.padding = "2px";
      //button.style.marginBottom = "3px";
      button.style.width = "0.9em";
      button.style.cursor = "pointer";
	  
    }