function movstar(a,time){
movx=setInterval("mov("+a+")",time)
}
function movover(){
clearInterval(movx)
}
function mov(a){
scrollx=principal.document.body.scrollLeft
scrolly=principal.document.body.scrollTop
scrolly=scrolly+a
principal.window.scroll(scrollx,scrolly)
}
function o_down(theobject){
object=theobject
while(object.filters.alpha.opacity>60){
object.filters.alpha.opacity+=-10}
}
function o_up(theobject){
object=theobject
while(object.filters.alpha.opacity<100){
object.filters.alpha.opacity+=10}
}
function wback(){
if(principal.history.length==0){window.history.back()}
else{principal.history.back()}
}