var showcolmode = 'table-cell';
if (document.all)
    showcolmode = 'block';
function hidedestcalendar(yeartohide){
	var calyear;
	var allyears = new Array('firstyearcol', 'secondyearcol');
	for (calyear in allyears){
	    cells = document.getElementsByName(allyears[calyear]);
	    mymode = (yeartohide == allyears[calyear]) ? 'none' : showcolmode;
	    for (i=0;i<cells.length;i++)
		cells[i].style.display = mymode;
	}
}