function changeover(layer) {
	var layerNum = '5';
	var direction = 'up';
	var divs = document.getElementsByTagName("div");
	for (var i=0;i<divs.length;i++) {
      if (divs[i].id.indexOf("layer_") >= 0) {
	    if(divs[i].id.indexOf(layer) >= 0) { direction = 'down'; }
		if(direction == 'up') { layerNum = parseFloat(layerNum) + 1; } else { layerNum = parseFloat(layerNum) - 1; }
		var k = divs[i].style;
	    k.display = "block";
        k.zIndex = layerNum;
        k.top = '40px';
		if(divs[i].id.indexOf("layer_0") >= 0) { k.backgroundImage = "url(../images/tabBg_inactive_small.gif)"; } else { k.backgroundImage = "url(../images/tabBg_inactive.gif)"; }
	  }
	}
	var k = document.getElementById(layer).style;
    k.display = "block";
    k.zIndex = '20';
    k.top = '37px';
	k.backgroundImage = "url(../images/tabBg.gif)";
	if(layer == 'layer_0') { k.backgroundImage = "url(../images/tabBg_small.gif)"; } else { k.backgroundImage = "url(../images/tabBg.gif)"; }
  }
  
  function moveLayer(layer,direction,distance) {
	var obj = document.getElementById(layer);
	var curPos = direction=='up'||direction=='down'? obj.offsetTop : obj.offsetLeft;
	//alert(curPos);
	step = 1;
	var objStyle = obj.style;
	var newpos = direction=='up'||direction=='left'? parseInt(curPos) - step : parseInt(curPos) + step;
	distance = parseInt(distance) - step;
	if(objStyle.zIndex!='20') {
	  if(direction=='up'||direction=='down') {
	    objStyle.top = document.layers? newpos : newpos+'px';
	  } else {
	    objStyle.left = document.layers? newpos : newpos+'px';
	  }
	  distance!='0'?setTimeout("moveLayer('" + layer + "','" + direction + "','" + distance + "')", 30):null;
	}
  }