function RandomNumber()
{
  var num= Math.random(6);
  return num;
}
function RandomGraphics()
{
  var bx = RandomNumber();
  if (bx > .5) {document.write("<a href='http://www.sanko.co.th/anchor_chemi.html' target='_parent'><img src='randompics/epx5k.gif' border='0'></a>"); return; }
  if (bx > .4) {document.write("<a href='http://www.sanko.co.th/eq_dc.html' target='_parent'><img src='randompics/DC16W.jpg' border='0'></a>"); return; } 
  if (bx > .3) {document.write("<a href='http://www.sanko.co.th/eq_dc.html' target='_parent'><img src='randompics/DC20HL.jpg' border='0'></a>"); return; }           
  if (bx > .2) {document.write("<a href='http://www.sanko.co.th/eq_dbd.html' target='_parent'><img src='randompics/DBD25X.jpg' border='0'></a>"); return; }   
  if (bx > .1) {document.write("<a href='http://www.sanko.co.th/eq_dbd.html' target='_parent'><img src='randompics/DBD16L.jpg' border='0'></a>"); return; }   
  if (bx > .0) {document.write("<a href='http://www.sanko.co.th/d_bit.html' target='_parent'><img src='randompics/4_plus.gif' border='0'></a>"); return; }
}
RandomGraphics();
RandomNumber();