// background changer 

function setPicFish() {  
   var picHold = document.getElementById("fishRotate");  
   var pics = new Array("fish1.jpg", "fish2.jpg", "fish3.jpg", "fish4.jpg", "fish5.jpg", "fish6.jpg");
   var choose = Math.floor(Math.random()* pics.length);  
   picHold.style.background=" url("+'../../images/'+pics[choose]+") no-repeat";
}  

function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

addLoadEvent(setPicFish);