function showRollOver(id)
{
	document.getElementById(id).style.visibility='visible';
}

function hideRollOver(id)
{
	document.getElementById(id).style.visibility='hidden';
}

function openWin(wFile,wWidth,wHeight,wScrolling)
{
	myWin=window.open(wFile,'ctxWin','width='+wWidth+',height='+wHeight+',resizable=1,scrollbars='+wScrolling);
	myWin.moveTo((screen.width/2)-(wWidth/2),(screen.height/2)-(wHeight/2));
	myWin.focus();
}