var tmp='none'
var prc

function fi(ob, im){
 tmp=ob.src
 ob.src=im
}

function fo(ob){
 ob.src=tmp
 tmp='none'
}

function fu(obj){
var os=obj.style
 tmp=os.textDecoration
 os.textDecoration='underline'
}

function fn(obj){
 obj.style.textDecoration=tmp
}

function fc(obj){
var os=obj.style
 prc=os.color
 os.color='white'
}

function fp(obj){
 obj.style.color=prc
}

function on(o){
 o.style.borderColor='red'
}

function off(o){
  o.style.borderColor='white'
}