function trim(iStr)
{
	if(typeof iStr != "string")
	{
		return iStr;
	}
	
	var retVal = iStr;
	var ch = retVal.substring(0,1);
	while(ch==" ")
	{
		retVal = retVal.substring(1,retVal.length);
		ch = retVal.substring(0,1);
	}
	
	ch = retVal.substring(retVal.length-1, retVal.length);
	while(ch==" ")
	{
		retVal = retVal.substring(0,retVal.length-1);
		ch = retVal.substring(retVal.length-1, retVal.length);
	}
	
	return retVal;
}