function op(opacity, id) 
{
	var o = document.getElementById(id).style; 
	o.opacity = (opacity / 100);
	o.MozOpacity = (opacity / 100);
	o.KhtmlOpacity = (opacity / 100);
	o.filter = "alpha(opacity=" + opacity + ")";
}
var n=12;
var b=new Array();
for(i=1; i<=n; i++)
{
	b[i]=new Array();
	b[i]['t']=100;
	b[i]['v']=100;
}
setInterval(c, 25);
function c()
{
	for (i=1; i<=n; i++)
		if (b[i]['v']<b[i]['t']) { b[i]['v']+=10; op(b[i]['v'], 'image'+i);	} 
			else if (b[i]['v']>b[i]['t']) {	b[i]['v']-=10; op(b[i]['v'], 'image'+i); }
}
function over(i) { b[i]['t']=0; }
function out(i) {	b[i]['t']=100; }