function init() {
IE = (document.all)
NC = (document.layers)
Opera = (document.getElementById)
} 
function hiddenLayer() {
init();
if(IE) eval('document.all["descr"].style.visibility = "hidden"')
if(NC) eval('document.layers["descr"].visibility = "hidden"')
if(Opera) eval('document.getElementById("descr").style.visibility = "hidden"')
}
function showLayer() {
init();
if(IE) eval('document.all["descr"].style.visibility = "visible"')
if(NC) eval('document.layers["descr"].visibility = "visible"')
if(Opera) eval('document.getElementById("descr").style.visibility = "visible"')
}

function goupsr()
{for (i=100; i>=1; i--)
{self.scroll(1,i)}}

function godownsr()
{for (i=1; i<=500; i++)
{self.scroll(1,i)}}