// JavaScript Document


var scrollStep = 1;
var scrollTimerID = null;
var scrollInterval = 6;

var maxBodyClipBottom = 0;

var ie_clipTop = 0;
var ie_clipBottom = 230;
var ie_clipRight = 176;

var ns_clipBottom = 80;

var startPos = 320;

ie_top = new Array(2);
ie_bottom = new Array(2);
layheight = new Array(2);

function scrollDown(layname) {
	if (layname)
		layhelp = layname;
	if (document.layers) {
		if ( document.layers[layhelp].top > (startPos - layheight[layhelp] + ns_clipBottom) ) {
			document.layers[layhelp].top -= scrollStep;
			document.layers[layhelp].clip.top += scrollStep;
			document.layers[layhelp].clip.bottom += scrollStep;
			
			if (document.layers[layhelp].top > maxBodyClipBottom)
				scrollTimerID= setTimeout("scrollDown('"+layhelp+"')", scrollInterval);
		}
	} else if (document.all) {
		if ( document.all(layhelp).style.posTop > (startPos - layheight[layhelp] + ie_clipBottom) ) {
			
			document.all(layhelp).style.posTop -= scrollStep;
			ie_top[layhelp] += scrollStep;
			ie_bottom[layhelp] += scrollStep;
			
			document.all(layhelp).style.clip = 'rect(' + ie_top[layhelp]  + ' ' + ie_clipRight + ' ' + ie_bottom[layhelp] + ' 0)';
			if (document.all(layhelp).style.posTop > (startPos - layheight[layhelp]))
				scrollTimerID= setTimeout("scrollDown('"+layhelp+"')", scrollInterval);
		}
	} else 	if (document.getElementById(layhelp).style.top.split("px")[0] >	(startPos - layheight[layhelp] + ie_clipBottom)){
	
		document.getElementById(layhelp).style.top = document.getElementById(layhelp).style.top.split("px")[0] - (scrollStep+2);
		ie_top[layhelp] += (scrollStep+2);
		ie_bottom[layhelp] += (scrollStep+2);
		
		document.getElementById(layhelp).style.clip = 'rect(' + ie_top[layhelp]  + ' ' + ie_clipRight + ' ' + ie_bottom[layhelp] + ' 0)';
		
		if (document.getElementById(layhelp).style.top.split("px")[0] > (startPos - layheight[layhelp]))
			scrollTimerID= setTimeout("scrollDown('"+layhelp+"')", scrollInterval);
	}
}

function scrollUp(layname) {
	if (layname)
		layhelp = layname;
		
	if (document.layers) {
		if ( document.layers[layhelp].top < startPos) {
			document.layers[layhelp].top += scrollStep;
			document.layers[layhelp].clip.top -= scrollStep;
			document.layers[layhelp].clip.bottom -= scrollStep;

			if (document.layers[layhelp].top < startPos)
				scrollTimerID= setTimeout("scrollUp('"+layhelp+"')", scrollInterval);
		}
	} else if (document.all)  {
		if ( document.all(layhelp).style.posTop < startPos ) {
			document.all(layhelp).style.posTop += scrollStep;
			ie_top[layhelp] -= scrollStep;
			ie_bottom[layhelp] -= scrollStep;
			document.all(layhelp).style.clip = 'rect(' + ie_top[layhelp]  + ' ' + ie_clipRight + ' ' + ie_bottom[layhelp] + ' 0)';

			if ((document.all(layhelp).style.posTop ) < startPos)
				scrollTimerID= setTimeout("scrollUp('"+layhelp+"')", scrollInterval);
		}
	} else if (document.getElementById(layhelp).offsetTop < startPos ) {
		
		document.getElementById(layhelp).style.top = parseInt(document.getElementById(layhelp).style.top.split("px")[0]) + (scrollStep+2);
		ie_top[layhelp] -= (scrollStep+2);
		ie_bottom[layhelp] -= (scrollStep+2);
		document.getElementById(layhelp).style.clip = 'rect(' + ie_top[layhelp]  + ' ' + ie_clipRight + ' ' + ie_bottom[layhelp] + ' 0)';

		if (document.getElementById(layhelp).offsetTop < startPos)
			scrollTimerID= setTimeout("scrollUp('"+layhelp+"')", scrollInterval);
	}
}

function stopScrolling() {
	clearTimeout(scrollTimerID);
}

function setClipping(layname, clipBottom, scroll) {
	maxBodyClipBottom = clipBottom;
	ie_top[layname] = ie_clipTop;
	ie_bottom[layname] = ie_clipBottom;
	if (document.layers) {
		document.layers[layname].top = startPos;
		layheight[layname] = document.layers[layname].document.height;
		document.layers[layname].clip.left = 0;
		document.layers[layname].clip.right = 190;
		document.layers[layname].clip.bottom = ns_clipBottom;
		document.layers[layname].visibility = "show";
	} else if (document.all) {
		layheight[layname] = document.all(layname).scrollHeight;
		document.all(layname).style.posTop=startPos;
		document.all(layname).style.clip = 'rect(' + ie_clipTop  + ' ' + ie_clipRight + ' ' + ie_clipBottom + ' 0)';
		document.all(layname).style.visibility = "visible";
	} else {
		layheight[layname] = document.getElementById(layname).offsetHeight;
		document.getElementById(layname).style.top=startPos;
		document.getElementById(layname).style.clip = 'rect(' + ie_clipTop  + ' ' + ie_clipRight + ' ' + ie_clipBottom + ' 0)';
		document.getElementById(layname).style.visibility = "visible";
	}	
}