function startAnimation(){
var ani = {	
	aguilejos: {
		type:	'left',
		from:    -300,
		to:		screen.availWidth,
		step:	1,
		delay:	100
	},
	
	nube2: {
		type:	'left',
		from:    300,
		to:		screen.availWidth,
		step:	1,
		delay:	200
	},
	nube3: {
		type:	'left',
		from:  	20,
		to:		 screen.availWidth,
		step:	1,
		delay:	250
	},
		nube4: {
		type:	'left',
		from:  	-100,
		to:		 screen.availWidth,
		step:	1,
		delay:	230
	}
	
};

	$fx('#aguil2').fxAdd(ani.aguilejos).fxRun(null,-1);
	$fx('#nube').fxAdd(ani.nube2).fxRun(null,-1);
	$fx('#nube3').fxAdd(ani.nube3).fxRun(null,-1);
	$fx('#nube4').fxAdd(ani.nube4).fxRun(null,-1);
}