function getCurrentPos(layer)
{
currentpos = document.getElementById(layer).style.left;
thepos = parseInt(currentpos);
return thepos;
}
function scrollRight(layer)
{
currentpos = getCurrentPos(layer);
nextpos = currentpos - 500;
newpos = nextpos + "px";
document.getElementById(layer).style.left = newpos;
currentpos = getCurrentPos(layer);
if(currentpos <= -980)
{
document.getElementById('rightarrow').innerHTML = "";
document.getElementById('leftarrow').innerHTML = "![](\"images/leftarrow.gif\")
";
}
else
{
document.getElementById('rightarrow').innerHTML = "![](\"images/rightarrow.gif\")
";
document.getElementById('leftarrow').innerHTML = "";
}
//document.getElementById('devpos').innerHTML = currentpos;
}
function scrollLeft(layer)
{
currentpos = getCurrentPos(layer);
nextpos = currentpos + 500;
newpos = nextpos + "px";
document.getElementById(layer).style.left = newpos;
currentpos = getCurrentPos(layer);
if(currentpos >= 20)
{
document.getElementById('leftarrow').innerHTML = "";
document.getElementById('rightarrow').innerHTML = "";
}
else
{
document.getElementById('leftarrow').innerHTML = "";
document.getElementById('rightarrow').innerHTML = "";
}
//document.getElementById('devpos').innerHTML = currentpos;
}