function showContactForm() { showFloatingDiv("contactform"); }
		function hideContactForm() { hideFloatingDiv("contactform"); }
		
		function showFloatingDiv(divId, showOverlay){
			var showOverlay = (showOverlay == null) ? true : showOverlay;
			var arrayPageSize = getPageSize();
			var arrayPageScroll = getPageScroll();
			var modalWindow = document.getElementById(divId);
			modalWindow.style.top = arrayPageScroll[1] + 'px';
	
			if (showOverlay) {
				var overlay = document.getElementById("overlay");
				overlay.style.height = arrayPageSize[1]+'px';
				overlay.style.width = arrayPageSize[0]+'px';
				overlay.style.display = 'block';
			}
			modalWindow.style.visibility = 'hidden';
			modalWindow.style.display = 'block';
			modalWindow.style.left = Math.floor((arrayPageSize[2] - modalWindow.offsetWidth) / 2) + 'px';
			modalWindow.style.visibility = 'visible';
			if (showOverlay) {
				var arrayPageSize = getPageSize();
				overlay.style.height = arrayPageSize[1]+'px';
			}
		}

		function hideFloatingDiv(divId, hideOverlay){
			var hideOverlay = (hideOverlay == null) ? true : hideOverlay;
			var overlay = document.getElementById("overlay");
			var modalWindow = document.getElementById(divId);
			if (hideOverlay) {
				overlay.style.display = 'none';
			}
			modalWindow.style.display = 'none';
		}

		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;
		}

		function getPageScroll(){
			var yScroll;
			if (self.pageYOffset) {
				yScroll = self.pageYOffset;
			} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
				yScroll = document.documentElement.scrollTop;
			} else if (document.body) {// all other Explorers
				yScroll = document.body.scrollTop;
			}
			arrayPageScroll = new Array('',yScroll)
			return arrayPageScroll;
		}