function grow(strClass) {
		var arrBoxes = document.getElementsByTagName("div");

		for(var i=0; i<arrBoxes.length; i++){
			if((arrBoxes[i].className.search(strClass) != -1 )){
				arrBoxes[i].style.height = '255px';
			}
		}
	}

	function shrink(strClass) {
		var arrBoxes = document.getElementsByTagName("div");
		for(var i=0; i<arrBoxes.length; i++){
			if((arrBoxes[i].className.search(strClass) != -1 )){
				arrBoxes[i].style.height = '170px';
			}
		}
	}