function Div(elt, color) {
        this.div = elt;
        this.color = color;
      }
      
    var previousDivs = null;
      
   
      function changeColor(elt, color) {
    
        if(previousDivs != null) {          
          for(var i = 0 ; i < previousDivs.length ; i++) {
            previousDivs[i].div.style.backgroundColor =
previousDivs[i].color;
          }
        }
     
        previousDivs = new Array();
           
        previousDivs[0] = new Div(elt, elt.style.backgroundColor);
       
        elt.style.backgroundColor = color;
      
        for(var i = 2 ; i < arguments.length ; i++) {
          var currentDiv = document.getElementById(arguments[i]);
          previousDivs[previousDivs.length] = new Div(currentDiv,
currentDiv.style.backgroundColor);
          currentDiv.style.backgroundColor = color;
        }                
      }
	  


	  

statesHistory=new Array()
statesHistory[0]="time_08" 
statesHistory[1]="time_07" 
statesHistory[2]="time_06"  
statesHistory[3]="time_05" 
statesHistory[4]="time_04" 

statesHistory[5]="time_02" 
statesHistory[6]="time_01" 
statesHistory[7]="time_00"  
statesHistory[8]="time_99" 


statesHistory[9]="time_96" 



statesHistory[10]="time_93" 
statesHistory[11]="time_91" 


statesHistory[12]="time_88" 

statesHistory[13]="time_86" 

statesHistory[14]="time_84" 


statesHistory[15]="time_81" 
statesHistory[16]="time_80"
 
statesHistory[17]="time_78" 
 
statesHistory[18]="time_76" 


statesHistory[19]="time_73" 

statesHistory[20]="time_71" 










function hideallexceptHistory(elm) { 
for (var i = 0; i < statesHistory.length; i++) { 
var layer = document.getElementById(statesHistory[i]); 
if (elm!= statesHistory[i]) { 
layer.style.display = "none"; 
} 
else { 
layer.style.display = "block"; 
} 
} 
}