function scoreCount(score){
var srcwriu="/images/score/";
var num=Math.floor(score/10+1);
if(num>=50){
num=50;
}
var urlString=srcwriu+num+".gif";
return "<a href='/pop_grade.html' target='_blank'><img src='"+urlString+"' title='"+score+"' style='border:none'/></a>";
}