Javascript expand/collapse Options

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CODE

<script language="JavaScript" type="text/javascript">
function doMenu(item) {
obj=document.getElementById(item);
col=document.getElementById("x" + item);
if (obj.style.display=="none") {
  obj.style.display="block";
  col.innerHTML="[-]";
}
else {
  obj.style.display="none";
  col.innerHTML="[+]";
}
}
</script>

Ok, that's the code I got for the expand/collapse effect.

The problem is I need to know how to make it hidden to visitors when the page is loaded. So, like there would be only a title at first... Not a title plus the content including the link to collapse.

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Ok, I guess no one knows much about Javascripts. Feel free to close. I'm gonna try to figure it out myself.