// JavaScript Document
var image = 0;
   window.onload = function(){
		startUp();
   }
	
   function startUp(){	    
		setInterval("displayEmergService()", 4000);
   }

   function displayEmergService(){
   if(image == 0){
    	document.getElementById("emergency").src = "images/Branches.gif";
		++image;
	}
	else{
		document.getElementById("emergency").src ="images/Emergency.gif";
		image = 0;
	}
   }