theTexts = new Array()
theTexts[0] = "<a HREF=#><img src=image/1.gif height=50 width=430 border=0 alt='东方商务网'></a>";
theTexts[1] = "<a HREF=#><img src=image/2.gif height=50 width=430 border=0 alt='东方商务网'></a>";
theTexts[2] = "<a HREF=#><img src=image/3.gif height=50 width=430 border=0 alt='东方商务网'></a>";
theTexts[3] = "<a HREF=#><img src=image/4.gif height=50 width=430 border=0 alt='东方商务网'></a>";
theTexts[4] = "<a HREF=#><img src=image/5.gif height=50 width=430 border=0 alt='东方商务网'></a>";
theTexts[5] = "<a HREF=#><img src=image/6.gif height=50 width=430 border=0 alt='东方商务网'></a>";

var rand = Math.round(Math.random()*5);
while (rand >5) {
   rand = Math.round(Math.random()*5);
}
document.write(theTexts[rand]);