function viewSheet(name){
for (nm in this.pages){
sheet = this.pages[nm];
if (nm==name) sheet.style.display='block'; 
else sheet.style.display='none';}
try{window.event.returnValue=false;}catch(e){}
return;}// false;}

/*function addSheet(name, id)
{
this.pages[name]=document.getElementById(id);
} 
*/
function addSheet(id)
{
this.pages[id]=document.getElementById(id);
} 

function Sheets()
{
this.View = viewSheet;
this.pages = new Object();
this.Add = addSheet;
}