function switchBg(image) {

	var bg= document.getElementById("header");
	bg.style.background="#FFFFFF url(images/banner_" +image+ ".jpg) no-repeat";

	return false;
	}


function switchThumbsize(newsize) {

	if(isNaN(newsize)) {
		return false;
		}

	var arr = document.getElementsByTagName("img");
	for (i= 0; i< arr.length; i++) {
		if(arr[i].className== 'thumbnail') {
			//alert("Current size is: " + arr[i].style.height + ". Will convert to " + newsize);
			arr[i].style.height= newsize;		
			}
		}

	return false;
	}