Code :
<script>
function getLoginInfo(){
var loginname[1]="login";
var loginpwd[1]="pwd";
var loginname[2]="marcoyeung";
var loginpwd[2]="infotalkong";
}
getLoginInfo();
var captchaCorr;
function generateCaptchaImage(){
var captchaImage=document.getElementById("captchaImage");
var captchaNumber=Math.floor(Math.random()*10+1);
switch(captchaNumber){
case 1:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/4020820.jpg";
captchaCorr="3H1O";
break;
case 2:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/4387355.jpg";
captchaCorr="63VD";
break;
case 3:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/2027648.jpg";
captchaCorr="B8T7";
break;
case 4:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/6532820.jpg";
captchaCorr="B23N";
break;
case 5:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/1239866.jpg";
captchaCorr="C1BS";
break;
case 6:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/4505395.jpg";
captchaCorr="DAB3";
break;
case 7:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/2555220.jpg";
captchaCorr="H2KF";
break;
case 8:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/3738849.jpg";
captchaCorr="H84H";
break;
case 9:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/6334357.jpg";
captchaCorr="JD84";
break;
case 10:
captchaImage.src="https://www.weebly.com/uploads/2/5/3/9/25398845/3832297.jpg";
captchaCorr="YTEU";
break;
default:
generateCaptchaImage();
break;
}
return false;
}
function checkPassword(name,pwd,captchaInput){
var captchaInputTemp=captchaInput;
captchaInput=captchaInputTemp.toUpperCase();
captchaInputTemp=""
for (var i=1; i<loginname.length; i++;){
if name=loginname[i]{
if pwd=loginpwd[i]{
window.location.href="/go.html?url=member.html";
}
}
}
}
</script>
<h1>LOGIN FORM</h1>
<form action="">
Login Name : <input type="text" name="loginname"><br>
Login Pwd : <input type="password" name="loginpwd"><br>
Captcha : <input type="text" name="captchaInput" id="captchaInput" maxlength="4" size="4">
<input type="submit" onclick="checkPassword(this.form.loginname.value,this.form.loginpwd.value,this.form.captchaInput.value);return false;" value="Login"><br>
<img id="captchaImage" src="" />
</form>
<script>
generateCaptchaImage();
</script>
<script>
function getLoginInfo(){
var 
