function fixHeight() {
	var sidebarHeight = document.getElementById("sidebar").clientHeight;
	var mainHeight = document.getElementById("main").clientHeight;
	
	if(sidebarHeight >= mainHeight) {
		document.getElementById("main").style.height = sidebarHeight;
	}
	else {
		document.getElementById("sidebar").style.height = mainHeight;
	}
}

function rightMove() {
	document.ns = navigator.appName == "Netscape";

	if(document.ns) {
		if(pageYOffset < 150) {
			document.getElementById("gt").style.display = "none";
		}
		else {
			document.getElementById("gt").style.display = "block";
		}
		document.getElementById("gt").top = pageYOffset + window.innerHeight;
		
		setTimeout("rightMove();", 80);
	}
	else {
		if(document.documentElement.scrollTop < 150) {
			document.getElementById("gt").style.display = "none";
		}
		else {
			document.getElementById("gt").style.display = "block";
		}
		document.getElementById("gt").style.top = document.documentElement.scrollTop + document.documentElement.offsetHeight - 45;
		
		setTimeout("rightMove();", 80);
	}
}

function showBack() {
	if(navigator.appName == "Netscape") {
		document.write("<layer id=\"gt\" style=\"position: absolute; margin-left: 735px\" title=\"返回顶部\" onclick=\"document.location='#container'\">YYY</layer>");
		document.getElementById("gt").pageY = pageYOffset + window.innerHeight;
		
		rightMove();
	}
	else {
		document.write("<div id=\"gt\" style=\"position: absolute; margin-left: 735px\" title=\"返回顶部\" onclick=\"document.location='#container'\">YYY</div>");
		document.getElementById("gt").style.top = document.documentElement.scrollTop + document.documentElement.offsetHeight - 45;
		
		rightMove();
	}
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