/* TopImage */
var topImg1 = '<img src="common/images/topworks01.jpg" width="359" height="403" alt="代表作：蛙の酒器" />';
var topImg2 = '<img src="common/images/topworks02.jpg" width="359" height="403" alt="代表作：花瓶" />';
var topImg3 = '<a href="http://10gei.com/gallery/artwork/2004/111437.html"><img src="common/images/topworks03.jpg" width="359" height="403" alt="代表作：花入TK" /></a>';
var topImg4 = '<a href="http://10gei.com/gallery/artwork/2005/0914205.html"><img src="common/images/topworks04.jpg" width="359" height="403" alt="代表作：アメ色の焼酎カップ" /></a>';
var topImg5 = '<a href="http://10gei.com/gallery/artwork/2004/111947.html"><img src="common/images/topworks05.jpg" width="359" height="403" alt="代表作：花生" /></a>';

function randomImg(n){
  if(n <= 0.2){
      document.write(topImg1);
  }else if(n <= 0.4){
      document.write(topImg2);
  }else if(n <= 0.6){
      document.write(topImg3);
  }else if(n <= 0.8){
      document.write(topImg4);
  }else if( n<= 1){
      document.write(topImg5);
  }
}

randomImg(Math.random());