ie = document.all iens6=document.all||document.getElementById ns4=document.layers var scrollspeed if (ie) scrollspeed = 40 else scrollspeed = 40 var step=1 function preparar() { if (iens6){ document.write('

') document.write('

') } } function scrolldown() { if(window.scrolltimerup){ clearTimeout(scrolltimerup) } if(iens6&&parseInt(contentobj.style.top)>=(contentheight*(-1)+100)){ contentobj.style.top=parseInt(contentobj.style.top)-step }else { stopall() if (iens6) { contentobj.style.top=0 }else{ contentobj.top=0 } } if(ns4&&contentobj.top>=(contentheight*(-1)+100)){ contentobj.top-=step } scrolltimerdown = setTimeout("scrolldown()",scrollspeed) } function scrollup() { if(window.scrolltimerdown){ clearTimeout(scrolltimerdown) } if(iens6&&parseInt(contentobj.style.top)<=0){ contentobj.style.top=parseInt(contentobj.style.top)+step }else if(ns4&&contentobj.top<=0){ contentobj.top+=step } scrolltimerup = setTimeout("scrollup()",scrollspeed) } function stopall() { if(window.scrolltimerup){ clearTimeout(scrolltimerup) } if(window.scrolltimerdown){ clearTimeout(scrolltimerdown) } } function shifttotop(){ stopall() if (iens6) { contentobj.style.top=0 }else{ contentobj.top=0 } scrolldown() } function getcontent_height(){ if (iens6) contentheight=contentobj.offsetHeight } function iniciar(){ getcontent_height() scrolldown() }