var ex = 0; 
var prevex = 0;

function exposetab(ex) {
	if(ex != prevex) {
	document.getElementById('folder-page'+ex).style.display="block";
	document.getElementById('exfolder'+ex).style.backgroundImage="url(/images/active-tab.gif)";
	document.getElementById('exfolder'+ex).style.fontWeight="bold";
	document.getElementById('exfolder'+ex).style.height="21px";		
	}
	if(prevx != 0) {
		if(ex !=prevex){
		document.getElementById('folder-page'+prevex).style.display="none";
		document.getElementById('exfolder'+prevex).style.backgroundImage="url(/images/passive-tab.gif)";
		document.getElementById('exfolder'+prevex).style.fontWeight="normal";
		document.getElementById('exfolder'+prevex).style.height="20px";
		}
		
	}
prevex = ex; 
}