// freeridecoding fader
var id;
var op=0.0;
var theobject;

function performappear()
{	
	op=op+0.04;
	theobject.style.opacity=op;
	if (op>=1) {
		clearInterval(id);
		op=0.0;
	}
}

function frcappear(object)
{
theobject=object;
id = setInterval("performappear();",20);		
}

function changemainimage(url)
{
	document.getElementById('mainimage').style.opacity=0;
	document.getElementById('mainimage').style.background="url('"+url+"')";
	frcappear(document.getElementById('mainimage'));
}