Math.randomMax = function(maxVal,asFloat){
	var val = Math.random()*maxVal;
	return asFloat?val:Math.round(val);
}

function changeMe(){
	var randomNumber = Math.randomMax(2);
	var theNumber = randomNumber +1;
	var path = 'img/petrovsky_splash_'+theNumber+'.gif';
	document.img_splash.src = path;
		
}