document.writeln("<img src=x.gif id=num1><img src=x.gif id=num2><img src=x.gif id=num3><img src=x.gif id=num4>");
document.writeln("<input name=gencode type=hidden id=gencode readonly>");
document.writeln("<input name=checkcode type=text id=checkcode style=width:110px>");
randomizer();
function randomizer()
{
total = 0;
for (var i=1; i < 10000;i=i*10)
{
num = Math.round(1+Math.random()*8);
if (i == 1)
document.getElementById('num4').src = num + ".gif";
else if (i == 10)
document.getElementById('num3').src = num + ".gif";
else if (i == 100)
document.getElementById('num2').src = num + ".gif";
else if (i == 1000)
document.getElementById('num1').src = num + ".gif";

total = total + (num * i);
}
document.getElementById('gencode').value = total;
document.getElementById('checkcode').value = "";
}

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
  } 
 if (document.getElementById('checkcode').value != document.getElementById('gencode').value)
{
	alert("Invalid Code entered");
	errors += "Invalid Code entered.\n";
	randomizer();
}
if (errors) alert('The following error(s) occurred:\n'+errors);
document.MM_returnValue = (errors == '');
}