function scrollback(){
  var posY = document.body.scrollTop || document.documentElement.scrollTop;
  var tgtY = 0;
  var cnt=0;
  var interval=10;
  var timer = setInterval(function(){
	if(posY <= 1){
		window.scrollTo(document.body.scrollLeft,tgtY);
		clearInterval(timer);
		return false;	
	}else{
		if(cnt>5) {
			posY += (tgtY-posY)/2;
		}else{
			posY += (tgtY-posY)/10*cnt;
		}
		window.scrollTo(0,posY);
		cnt++;
	}
  },interval);
}

function getInsideWindowHeight() {
	if(window.innerHeight) {
		return window.innerHeight;
	}else if(document.compatMode && document.compatMode.indexOf("CSS1")>=0) {
		return document.body.parentElement.clientHeight;
	}else if(document.body && document.body.clientHeight) {
		return document.body.clientHeight;
	}
	return 0;
}

function showHide(s){
	var nm=document.getElementById(s);
	if(nm.style.display=='block'){
		nm.style.display='none';
	}else{
		nm.style.display='block';
	}
}

function toggleExp(o) {
	if(o.firstChild.alt == "OPEN"){
		o.firstChild.alt = "CLOSE";
		o.firstChild.src = "../img/blt_close.gif";
		document.getElementById('expBox').style.display = 'block';
	}else{
		o.firstChild.alt = "OPEN";
		o.firstChild.src = "../img/blt_expand.gif";
		document.getElementById('expBox').style.display = 'none';
	}
}

function startPage(o){
	if(o==1){
		$("#startpage").fadeIn("slow");
		clearInterval(tid);
	}else if(o==0){
		tid=setInterval("startPage()",1000);
	}else{
		$("#startpage").fadeOut("slow");
		clearInterval(tid);
	}
}