function getPageSize() {
		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;
		}
		arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
		return arrayPageSize;
	};
	

	function showCalendar(calendarUrl){
		/**
		* GETS CALENDAR 
		**/
		dojo.xhrGet({
        	url: calendarUrl,
        	load: function (response, ioArgs){
        		dojo.byId('calendarBox').innerHTML=response;
				return response;
    			},
    		error: function(response, ioArgs){
    				dojo.byId('calendarBox').innerHTML='An error occured, with response:'+response;
    				return response;
    			},
    		handleAs:"text"
        	});
		/**
		* SHOWS CALENDAR
		**/
		dojo.style('calendarOverlay', 'display', '');
		x=getPageSize();
		dojo.byId('calendarOverlay').style.width=x[0]+'px';
		dojo.byId('calendarOverlay').style.height=x[1]+'px';
		var anim=dojo.animateProperty({
				node:'calendarOverlay', duration:500, delay:100,
				properties:{
					opacity:{end:0.9}
				}
			});
		anim.play();    	
    }//func
	
    function hideCalendar(){
    	dojo.style('calendarOverlay', 'display', 'none');
    	dojo.style('calendarOverlay', 'opacity', '0');
    	dojo.byId('calendarBox').innerHTML='';
    }//func
	
	function changeMonth(calendarUrl){
		dojo.xhrGet({
        	url: calendarUrl,
        	load: function (response, ioArgs){
        		dojo.byId('calendarBox').innerHTML=response;
				return response;
    			},
    		error: function(response, ioArgs){
    				dojo.byId('calendarBox').innerHTML='An error occured, with response:'+response;
    				return response;
    			},
    		handleAs:"text"
        	});
	}