var states="hide";
var layer=null;
var width=0;
function setLayer(a,b)
{
 layer=a;
 width=b-5;
 setTimeout("move()",1000);
}
function setStates(a)
{
 states=a;
}
function move()
{
 if(layer!=null)
 if(states=="hide")
 {
  if(layer.style.left.substring(0,layer.style.left.length-2)>-width)
   layer.style.left=parseInt(layer.style.left.substring(0,layer.style.left.length-2))-15;
 }else if(states=="show")
 {
  if(layer.style.left.substring(0,layer.style.left.length-2)<0)
   layer.style.left=parseInt(layer.style.left.substring(0,layer.style.left.length-2))+15;
 }
 setTimeout("move()",100);
}