scrollSpeed=10;

function scrollIt(which,scrollHeight){
document.getElementById(which).scrollTop = document.getElementById(which).scrollTop + scrollHeight;
}


function scrollArea(btn,scarea,amt) {
scInterval = setInterval("scrollIt"+"('"+scarea+"',"+amt+")", scrollSpeed);	
oldsrc = new String(btn.src);
btn.src = oldsrc.replace('_up','_over');
}

function scrollStop(btn) {
clearInterval(scInterval);
oldsrc = new String(btn.src);
btn.src = oldsrc.replace('_over','_up');
}

function clearScrollable(anum) {
try{
var scb = 'sc'+anum;
var scbbuts = 'sc'+anum+'Buttons';
var elem = document.getElementById(scb);
 if (elem.clientHeight < elem.scrollHeight){
    //alert("The element has a vertical scrollbar!");}
	
}else{
    //alert("The element doesn't have a vertical scrollbar.");
	buts = document.getElementById(scbbuts);
	buts.style.display='none';
  }	
} catch(e) {
	
}
}