function resizeContentBlock() {
	var docHeight = document.body.clientHeight ? document.body.clientHeight : window.innerHeight;
	var newHeight = docHeight - 338;
	
	if (newHeight < 260) {
		newHeight = 260;
	}
	
	$("content_pink").style.height = newHeight + "px" ;
	$("content_blue").style.height = newHeight + "px";
	$("content_green").style.height = newHeight + "px";
}

function showGreen() {
	hideBlock("pink");
	hideBlock("blue");
	showBlock("green");
}

function showBlue() {
	hideBlock("pink");
	hideBlock("green");
	showBlock("blue");
}

function hideBlock(blockId) {
	$('block_' + blockId).hide();
	if ($('img_btn_' + blockId)) {
		$('img_btn_' + blockId).src = "images/btn_" + blockId + "1.gif";
	}
}

function showBlock(blockId) {
	$('block_' + blockId).show();
	if ($('img_btn_' + blockId)) {
		$('img_btn_' + blockId).src = "images/btn_" + blockId + "2.gif";
	}
}