var t=0;
preloadImages();

function preloadImages() {
      img66=newImage("/img/but_down-click.gif");
	  img77=newImage("/img/but_up-click.gif");
}

function newImage(path) {
      var image = new Image();
      image.src = path;
      return image;
}

function p_Up(r){
if(r==1)
document.Up.src=img77.src;
else
document.Up.src="img/but_up.gif";
}

function p_Down(r){
if(r==1)
document.Down.src=img66.src;
else
document.Down.src="img/but_down.gif";
}

function scrollup(){
a=document.getElementById("content").scrollTop;
document.getElementById("content").scrollTop=a+5;
}


function scrolldown(){
a=document.getElementById("content").scrollTop;
document.getElementById("content").scrollTop=a-5;
}

function goUp()
{
t=setInterval('scrollup();',10);
}

function stopUp()
{
clearInterval(t);
}

function goDown()
{
t=setInterval('scrolldown();',10);
}

function stopDown()
{
clearInterval(t);
}