var currentImage = '';

function fade(intid)
{
	if (intid == 0)
	{
		var strImageID = 'mainpic';
	}
	else
	{
		var strImageID = 'image'+intid
	}
	if (currentImage =='')
	{
		var $oHideEl = document.getElementById('mainpic');		
	}
	else
	{
		var $oHideEl = document.getElementById(currentImage);		
	}
	$oHideEl.style.display = 'none';
	
	Effect.Fade('mainpic', { duration: 0.2});
	Effect.Appear(strImageID, { duration: 0.5, queue: 'end', afterFinish: function(){	 } });
	
	currentImage = strImageID;
}