function showViewer(){
	document.getElementById("bg").style.display = "block";
	document.getElementById("viewer").style.display = "block";
	document.getElementById("viewer").src = "../viewer/index.html";
	document.getElementById("viewer").style.width = "800px";
	document.getElementById("viewer").style.height = "600px";
}
function hideViewer(){
	document.getElementById("bg").style.display = "none";
	document.getElementById("viewer").style.display = "none";
	document.getElementById("viewer").src = "";
}
function showMoreNews(obj){
	document.getElementById("bg").style.display = "block";
	document.getElementById("viewer").style.display = "block";
	document.getElementById("viewer").src = obj.src;
	document.getElementById("viewer").style.width = obj.wid + "px";
	document.getElementById("viewer").style.height = obj.hei + "px";
}