function EOd(arr)
{
	ret = ""
	for( i = 0; i < arr.length; i++ )
	{
		c = arr[i];
		ret +=( String.fromCharCode(255-c))
	}
	return ret;
}

var expandImage = new Image();
expandImage.src = "images/expand.gif";

var collapseImage = new Image();
collapseImage.src = "images/collapse.gif";

function switch_control( i )
{
	var imgctrl = document.getElementById('expand_control'+i);
	if( document.getElementById('expand_control'+i).src == collapseImage.src )
	{
		document.getElementById('expand_control'+i).src = expandImage.src;
		document.getElementById('summary_area'+i).style.display="none";
	}
	else
	{
		document.getElementById('expand_control'+i).src = collapseImage.src;
		document.getElementById('summary_area'+i).style.display="block";
	}
}