flag=0;
var temp;
var mov=4;


function idou(updown){
if(!flag)return;
if(updown)temp=updown;
if(temp=="down") //alert("down");
mov = 4;
if(temp=="up") //alert("up");
mov=-4;

//alert(self.frames[0].name);
var win_topics = self.frames[0];

win_topics.scrollBy(0,mov);
setTimeout("idou()", 10);
}