$(document).ready(function(){
	var adjustedHigh = 3,
    	numRand = Math.floor(Math.random()*adjustedHigh) + 1,
    	$body = $('body');
    	
	if( $body.hasClass('ski') || !$body.hasClass('surf') )
	{
		$body.addClass('ski'+numRand);
	}
	else
	{
		$body.addClass('surf'+numRand);
	}
});