img = new Array();
img[0] = "chara01";
img[1] = "chara02";
img[2] = "chara03";
img[3] = "chara04";
img[4] = "chara05";
img[5] = "chara06";
img[6] = "chara07";
img[7] = "chara08";
n = Math.floor(Math.random()*img.length);
document.write("<div class='chara iepng' id='"+img[n]+"'></div>");