function Thumbnail()
{

this[0] = '<a target="toplink" href="http://b-school.jp/blog/pchuo/"><img border="0" src="../images/regional/school/1.jpg" width="180" height="144"><br>別海中央小学校</a>';

this[1] = '<a target="toplink" href="http://b-school.jp/~pnotuke/index.htm"><img border="0" src="../images/regional/school/2.jpg" width="180" height="144"><br>野付小学校</a>';

this[2] = '<a target="toplink" href="http://b-school.jp/blog/pbetukai/"><img border="0" src="../images/regional/school/3.jpg" width="180" height="144"><br>別海小学校</a>';

this[3] = '<a target="toplink" href="http://b-school.jp/~pnakasyn/index.html"><img border="0" src="../images/regional/school/4.jpg" width="180" height="144"><br>中春別小学校</a>';

this[4] = '<a target="toplink" href="http://b-school.jp/blog/pmihara/"><img border="0" src="../images/regional/school/5.jpg" width="180" height="144"><br>美原小学校</a>';

this[5] = '<a target="toplink" href="http://b-school.jp/blog/pnakanis/"><img border="0" src="../images/regional/school/6.jpg" width="180" height="144"><br>中西別小学校</a>';

this[6] = '<a target="toplink" href="http://b-school.jp/blog/pkfuren/"><img border="0" src="../images/regional/school/7.jpg" width="180" height="144"><br>上風連小学校</a>';

this[7] = '<a target="toplink" href="http://b-school.jp/blog/pkamisyn/"><img border="0" src="../images/regional/school/8.jpg" width="180" height="144"><br>上春別小学校</a>';

this[8] = '<a target="toplink" href="http://b-school.jp/~ptoyohar/toyohara_index.htm"><img border="0" src="../images/regional/school/9.jpg" width="180" height="144"><br>豊原小学校</a>';

this[9] = '<a target="toplink" href="http://b-school.jp/blog/pnisisyn/"><img border="0" src="../images/regional/school/10.jpg" width="180" height="144"><br>西春別小学校</a>';

this[10] = '<a target="toplink" href="http://b-school.jp/blog/schuo/"><img border="0" src="../images/regional/school/11.jpg" width="180" height="144"><br>別海中央中学校</a>';

this[11] = '<a target="toplink" href="http://b-school.jp/~snakasyn/top/homepagetop.htm"><img border="0" src="../images/regional/school/12.jpg" width="180" height="144"><br>中春別中学校</a>';

this[12] = '<a target="toplink" href="http://b-school.jp/blog/snakanis/"><img border="0" src="../images/regional/school/13.jpg" width="180" height="144"><br>中西別中学校</a>';

this[13] = '<a target="toplink" href="http://b-school.jp/~sbetukai/index.htm"><img border="0" src="../images/regional/school/14.jpg" width="180" height="144"><br>別海中学校</a>';

this[14] = '<a target="toplink" href="http://b-school.jp/~skamisyn/index.htm"><img border="0" src="../images/regional/school/15.jpg" width="180" height="144"><br>上春別中学校</a>';

this[15] = '<a target="toplink" href="http://b-school.jp/blog/skaminis/"><img border="0" src="../images/regional/school/16.jpg" width="180" height="144"><br>上西春別中学校</a>';

this[16] = '<a target="toplink" href="http://b-school.jp/blog/skfuren/"><img border="0" src="../images/regional/school/17.jpg" width="180" height="144"><br>上風連中学校</a>';

this[17] = '<a target="toplink" href="http://b-school.jp/blog/snisisyn/"><img border="0" src="../images/regional/school/18.jpg" width="180" height="144"><br>西春別中学校</a>';

this[18] = '<a target="toplink" href="http://b-school.jp/blog/skaminis/"><img border="0" src="../images/regional/school/19.jpg" width="180" height="144"><br>上西春別小学校</a>';

this[19] = '<a target="toplink" href="http://b-school.jp/~snotuke/default.htm"><img border="0" src="../images/regional/school/20.jpg" width="180" height="144"><br>野付中学校</a>';

}

thum = new Thumbnail();

//変数n に最後のthis[n]の数値を入れてください。

n=19;
rannum=100/(n+1);
ran = Math.floor(Math.random()*100/rannum);
function printThumnail()
{
   document.write(thum[ran]);
}

