function open_win(url,w,h,s) {
	var l=(screen.width-w)/2;
	var t=(screen.height-h)/2;
	if(window.thiswin != undefined){
		thiswin.close();
	}
	thiswin = window.open(url,"openpopwin",'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars='+s+',resizable=0,width='+w+',height='+h+',left='+l+',top='+t+'');
}

function changeNews(move){
	var nnews = document.getElementById("nnewsitems").value;
	var newscur = document.getElementById("newscur").value;
	var curpos = document.getElementById("newsslider").style.left;
	var prevpos = parseFloat(curpos) + 494;
	var nextpos = parseFloat(curpos) - 494;
	
	if(document.getElementById("newslock").value == 0){
		document.getElementById("newslock").value = 1;
		if(move == "prev" && document.getElementById("newscur").value > 1){
			new Effect.Move("newsslider", { x:prevpos, y:0, mode:'absolute' });
			if(prevpos == 0){
				Effect.Fade("newsprev");
			}
			if(document.getElementById("newsnext").style.display == "none"){
				Effect.Appear("newsnext");
			}
			document.getElementById("newscur").value--;
		}else if(move == "next" && document.getElementById("newscur").value < nnews){
			new Effect.Move("newsslider", { x:nextpos, y:0, mode:'absolute' });
			if(newscur == parseFloat(nnews)-1){
				Effect.Fade("newsnext");
			}
			if(document.getElementById("newsprev").style.display == "none"){
				Effect.Appear("newsprev");
			}
			document.getElementById("newscur").value++;
		}
		setTimeout("document.getElementById('newslock').value = 0",1000);
	}
}