[solved] Pass Arg to Function?

// CASE 1 using as: simpleaction()
function simpleaction()
{
krpano = document.getElementById('krpanoSWFObject').get('global');
krpano.call('mykrpanoAction(bla);');
}
// CASE 2 using as: simpleaction2(bla)
function simpleaction2(myArg)
{
krpano = document.getElementById('krpanoSWFObject').get('global');
krpano.call('mykrpanoAction(' + myArg + ');');
}

Case 1 (without argument) works fine

Case 2 (with argument) no works

Please, What is wrong in Case 2?

Solved by lastromantik (Thanks very much again!!!!)

In index.html

function simpleaction(myArg)
{
krpano = document.getElementById('krpanoSWFObject').get('global');
krpano.call(`localiza_mapa("${myArg}");`);
}

------

In .xml

</span><br><br></a></li>
<span class="ubicar" onclick="simpleaction('c1');">
Testing<br>
</span><br><br></a></li>