function webcode()
  {
  var c1 = document.promotioncode.code_1.value;
  var c2 = document.promotioncode.code_2.value;
  var c3 = document.promotioncode.code_3.value;

  if(c1.length==5)
    {
    if(c1.charCodeAt(4)=="45" || c1.charCodeAt(4)=="32" || c1.charCodeAt(4)=="46") {document.promotioncode.code_2.focus(); }
    c1=c1.substring(0,c1.length-1);
    document.promotioncode.code_1.value=c1;
    }

  if(c2.length==5)
    {
    if(c2.charCodeAt(4)=="45" || c2.charCodeAt(4)=="32" || c2.charCodeAt(4)=="46") {document.promotioncode.code_3.focus(); }
    c2=c2.substring(0,c2.length-1);
    document.promotioncode.code_2.value=c2;
    }
  }