//var IE4=document.all?true:false;

function HLite(sBtnName,bOn)
{
    if (bOn)    {
		var rollbutton = sitedef+"images/"+sBtnName+"_on.gif";
		document.images[sBtnName].src = rollbutton;
		}
	else {
		var rollbutton = sitedef+"images/"+sBtnName+"_off.gif";
		document.images[sBtnName].src = rollbutton;
	}
}
function HLite2(sBtnName,bOn)
{
    if (bOn)    {
		var rollbutton = sitedef+"images/circle_on.gif";
		document.images[sBtnName].src = rollbutton;
		}
	else {
		var rollbutton = sitedef+"images/circle_off.gif";
		document.images[sBtnName].src = rollbutton;
	}
}
function HLite3(sBtnName,bOn)
{
    if (bOn)    {
		var rollbutton = sitedef+"images/chevron_on.gif";
		document.images[sBtnName].src = rollbutton;
		}
	else {
		var rollbutton = sitedef+"images/chevron_off.gif";
		document.images[sBtnName].src = rollbutton;
	}
}

function Search(f)
{
	if ((IsEmpty(f.qu.value)) || (f.qu.value=="search"))	{
		alert("Please enter something to search for first.");
		f.qu.focus();
		return false;
	} else {
		return true;
	}
}

function IsEmpty (s)
{
	if (s==null || s=="undefined" || s=="")
		return true;
		
	for (var i = 0; i < s.length; i++)	{
		var ch = s.charAt (i);
		if ((ch != ' ') && (ch!= '\n') && (ch != '\t') && (ch != '\r'))
			return false;
	}
	return true;
}