// JavaScript Document
function changestyle(sndId)
{
 var sndObj=document.getElementById(sndId);
    try {
        sndObj.Play();
    }
    catch (e) {
        sndObj.DoPlay();
    }
}

function changestyle2(tr,clas,sndId)
{
tr.className=clas;
 var sndObj=document.getElementById(sndId);
    try {
        sndObj.Play();
    }
    catch (e) {
        sndObj.DoPlay();
    }
}