window.onload=function(){
tables=document.getElementsByTagName('table');
}

function view(name){

switch (name){

case "sheeta1":

for (var i=0;i<tables.length;i++){
if(tables[i].className=='sheeta') tables[i].style.display='none';
document.getElementById(name).style.display='block';
}
break;

case "sheeta2":

for (var i=0;i<tables.length;i++){
if(tables[i].className=='sheeta') tables[i].style.display='none';
document.getElementById(name).style.display='block';
}
break;

case "sheeta3":

for (var i=0;i<tables.length;i++){
if(tables[i].className=='sheeta') tables[i].style.display='none';
document.getElementById(name).style.display='block';
}
break;

case "sheetb1":

for (var j=0;j<tables.length;j++){
if(tables[j].className=='sheetb') tables[j].style.display='none';
document.getElementById(name).style.display='block';
}
break;

case "sheetb2":

for (var j=0;j<tables.length;j++){
if(tables[j].className=='sheetb') tables[j].style.display='none';
document.getElementById(name).style.display='block';
}
break;
}

}