function popup(sw) {
	for(i=1; i<=16; i++){
		if(document.getElementById('divpopup-'+ i)){
			if(sw == i){
				if (self.pageYOffset) {
					yScroll = self.pageYOffset;
				} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
					yScroll = document.documentElement.scrollTop;
				} else if (document.body) {// all other Explorers
					yScroll = document.body.scrollTop;
				}
				
							
				document.getElementById('divpopup-'+ i).style.height = document.body.scrollHeight +'px';
				document.getElementById('divpopup-'+ i).getElementsByTagName('div')[1].style.top = (yScroll + (document.body.clientHeight / 2)) +'px';
			}
			document.getElementById('divpopup-'+ i).style.display = (sw == i)?'block':'none';
		}
	}
}