var imageFlag=0
var max=3
var images1=new Array()

images1[0]="222palestinianmap.gif"
images1[1]="222plaincolor.gif"
images1[2]="222cities.gif"
images1[3]="222bw.gif"

function next()
{
 
 imageFlag+=1
if(imageFlag>max){imageFlag=0}

 document.palestine.src=images1[imageFlag]
                
}

 
function previous()
{

imageFlag -=1
if(imageFlag<0){imageFlag=max}   
document.palestine.src=images1[imageFlag]
              
        
}