function openMap() {
			scroll(0,0);
			document.getElementById("overlay").style.display ='block';
			document.getElementById("mapWrapper").style.display ='block';

			var arrayPageSize = getPageSize();
			document.getElementById("overlay").style.height = (arrayPageSize[1] + 'px');
		}

		function hideMap() {
			document.getElementById("overlay").style.display ='none';
			document.getElementById("mapWrapper").style.display ='none';
		}

		function showSection(whichSection) {
			if ((document.getElementById(whichSection).style.display == 'none') || (document.getElementById(whichSection).style.display == '')) {
				document.getElementById(whichSection).style.display = 'block';
			} else {
				document.getElementById(whichSection).style.display = 'none';
			}
		}

		// function for overlay, bits ripped from Lightbox version 1 by Lokesh Dhakar
		function getPageSize(){
			
			var xScroll, yScroll;
			
			if (window.innerHeight && window.scrollMaxY) {	
				xScroll = document.body.scrollWidth;
				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
				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 = windowWidth;
			} else {
				pageWidth = xScroll;
			}


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