var lastHeight;
function init() {
 autojudge();
lastHeight= right.document.body.scrollHeight;
setInterval(function(){
if(right.document.body.scrollHeight!=lastHeight) {
autojudge();
lastHeight= right.document.body.scrollHeight;
}
},1);
}
function autojudge(){
document.all('right').height=right.document.body.scrollHeight + 20;
}