var ani = {
	cloud01: {
		type:	'left',
		from:	0,
		to:		screen.availWidth,
		step:	1,
		delay:	40,
		onstart: function(){this.style.display = 'block'},
		onfinish: function(){this.style.filter = ''}
	},
	cloud02: {
		type:	'right',
		from:	0,
		to:		screen.availWidth,
		step:	1,
		delay:	50,
		onstart: function(){this.style.display = 'block'},
		onfinish: function(){this.style.filter = ''}
	},
	cloud03: {
		type:	'left',
		from:	0,
		to:		screen.availWidth,
		step:	1,
		delay:	70,
		onstart: function(){this.style.display = 'block'},
		onfinish: function(){this.style.filter = ''}
	},
	cloud04: {
		type:	'right',
		from:	0,
		to:		screen.availWidth,
		step:	1,
		delay:	60,
		onstart: function(){this.style.display = 'block'},
		onfinish: function(){this.style.filter = ''}
	},
};

function startAnimation() {
	$fx('#cloud01').fxAdd(ani.cloud01).fxRun(null,-1);
	$fx('#cloud02').fxAdd(ani.cloud02).fxRun(null,-1);
	$fx('#cloud03').fxAdd(ani.cloud03).fxRun(null,-1);
	$fx('#cloud04').fxAdd(ani.cloud04).fxRun(null,-1);
}