//<!--
function switchImage(imgName,newImg)
{ 
eval('document.' + imgName + '.src = "' + newImg + '"'); 
}

function OpenWindow(theURL, winName, width, height) 
{
var leftVal=(screen.width - width) / 2;
var topVal = (screen.height - height) / 2;
window.open(theURL, winName, 'toolbar=no,location=no,scrollbars=yes,width='+width+',height='+height+',left='+leftVal+',top='+topVal)
}

function hideLayer(whichLayer) {

if (document.getElementById) {
// this is the way the standards work
document.getElementById(whichLayer).style.visibility = "hidden";
}
else if (document.all) {
// this is the way old msie versions work
document.all[whichlayer].style.visibility = "hidden";
}
else if (document.layers) {
// this is the way nn4 works
document.layers[whichLayer].visibility = "hidden";
}

}

function showLayer(whichLayer) {

if (document.getElementById) {
// this is the way the standards work
document.getElementById(whichLayer).style.visibility = "visible";
}
else if (document.all) {
// this is the way old msie versions work
document.all[whichlayer].style.visibility = "visible";
}
else if (document.layers) {
// this is the way nn4 works
document.layers[whichLayer].visibility = "visible";
}

}


//-->