var adarray = new Array()
adarray[0]= "/upfile/ad/ccydt_ad_01.gif"
//adarray[1]= "/images/img/ad_reg_1.swf"
//adarray[2]= "/images/img/ad_reg_1.swf"
//adarray[3]= "/images/img/ad_reg_1.swf"
var swfwidth=202;
var swfheight=66;
var rndNum = Math.round(Math.random() * (adarray.length-1));
htmlcode  = '<img src="'+adarray[rndNum]+'" width="'+swfwidth+'" height="'+swfheight+'">';
document.write(htmlcode);