// Preload images
var icon1Url = 'icon1.gif';
var icon2Url = 'icon2.gif';
var prlimg1 = new Image;
prlimg1.src = icon2Url;

// Toggle details
function toggleDetails(id)
{
	// Get elements
	var img = document.getElementById('img_' + id);
	var details = document.getElementById('details_' + id);
	
	// Show / hide details DIV
	if ( details.style.display=='' )
	{
		details.style.display = 'block';
		img.src = icon2Url;
	}
	else
	{
		details.style.display = '';
		img.src = icon1Url;
	}
}