function setVisibility(rowName) {
var actualVisibility=document.getElementById(rowName).style.visibility;
if(actualVisibility=='' || actualVisibility=='visible') {
    document.getElementById(rowName).style.visibility = "hidden";
    document.getElementById(rowName).style.display = "none";
} else {
    document.getElementById(rowName).style.visibility = "visible";
    document.getElementById(rowName).style.display = ""; }}