var MovePanel = Class.create();

MovePanel.prototype = {
   initialize: function() {
      $('ScuoleMaterneLink').removeAttribute('href');
      $('ScuoleElementariLink').removeAttribute('href');
      $('ScuoleMaterneLink').observe('click', (function(){this.start($('ScuoleMaterneBox'));}).bind(this));
      $('ScuoleElementariLink').observe('click', (function(){this.start($('ScuoleElementariBox'), { top:300, color:'white', alpha:0.4  } );}).bind(this));
      var objBody = $$('body')[0];
   },

   start: function(item) {
      var arrayPageScroll = document.viewport.getScrollOffsets();
      var boxTop =  arrayPageScroll[1]+(document.viewport.getHeight()/3);
      var boxLeft = arrayPageScroll[0];
      var arrayPageSize = this.getPageSize();
      $('overlay').setStyle({width:arrayPageSize[0]+'px', height:arrayPageSize[1]+'px', background:'#000'});
      Effect.Appear('overlay',{from:0.0, to:0.8, duration:0.3});
      item.setStyle({top:boxTop+'px', left:boxLeft+'px'});
      item.setOpacity(0.6);
      /*
      item.show();
      new Effect.Move(item, {x:0, y:500, mode:'relative'});
      */
      item.appear();
      item.observe('click', (function() {this.end(item);}).bind(this));
   },

   end: function(item) {
      Effect.Fade('overlay',{duration:0.3});
      item.hide();
   },

    getPageSize: function() {
	        
	     var xScroll, yScroll;
		
		if (window.innerHeight && window.scrollMaxY) {	
			xScroll = window.innerWidth + window.scrollMaxX;
			yScroll = window.innerHeight + window.scrollMaxY;
		} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
			xScroll = document.body.scrollWidth;
			yScroll = document.body.scrollHeight;
		} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
			xScroll = document.body.offsetWidth;
			yScroll = document.body.offsetHeight;
		}
		
		var windowWidth, windowHeight;
		
		if (self.innerHeight) {	// all except Explorer
			if(document.documentElement.clientWidth){
				windowWidth = document.documentElement.clientWidth; 
			} else {
				windowWidth = self.innerWidth;
			}
			windowHeight = self.innerHeight;
		} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
			windowWidth = document.documentElement.clientWidth;
			windowHeight = document.documentElement.clientHeight;
		} else if (document.body) { // other Explorers
			windowWidth = document.body.clientWidth;
			windowHeight = document.body.clientHeight;
		}	
		
		// for small pages with total height less then height of the viewport
		if(yScroll < windowHeight){
			pageHeight = windowHeight;
		} else { 
			pageHeight = yScroll;
		}
	
		// for small pages with total width less then width of the viewport
		if(xScroll < windowWidth){	
			pageWidth = xScroll;		
		} else {
			pageWidth = windowWidth;
		}

		return [pageWidth,pageHeight];
	}
}