this.randomreviewa = function(){
	var length = $("#randoma li").length;
	var ran = Math.floor(Math.random()*length) + 1;
	$("#randoma li:nth-child(" + ran + ")").show();
};

$(document).ready(function(){	
	randomreviewa();
});

this.randomreviewb = function(){
	var length = $("#randomb li").length;
	var ran = Math.floor(Math.random()*length) + 1;
	$("#randomb li:nth-child(" + ran + ")").show();
};

$(document).ready(function(){	
	randomreviewb();
});

this.randomreviewc = function(){
	var length = $("#randomc li").length;
	var ran = Math.floor(Math.random()*length) + 1;
	$("#randomc li:nth-child(" + ran + ")").show();
};

$(document).ready(function(){	
	randomreviewc();
});