JavaScript - Js Obfuscator - What To Choose?

I'm just starting out with javascripting and am trying to make a Choose your own Adventure game. My goal is to have the scenes and alerts change depending on the button clicked, but I'm stuck, unfortunately. I keep getting the same alerts repeated and my image doesn't change. I think I'm missing code or have made a mistake somewhere, but have no idea what I've done wrong or left out. I don't know if this type of programming has a more specific name, too, so I wasn't sure what to search for to get help. Hopefully someone can guide me in the right direction. I've included my beginning code below.

Thanks

Code:

<script type="text/javascript">

var curScene = "0";

function userChoice(decision){
	alert(decision);
	
/*welcomepage*/
	if(curScene == 0) {
		alert("Welcome to the game.  Chose 1 or 2.");
		
		}if(decision == 1) {
			alert();
			curScene = 1;
		}else if(decision == 2){
			alert();
			curScene = 1;
		}
			
			
/*Scene1*/
		if(curScene == 1){
			alert("go left or right");
				}if(decision == 1) {
			alert("you went left and fell in a hole");
			curScene = 3;
		}else if(decision == 2){
			alert("you go right and come upon a zebra");
			curScene = 4;
		}
}

document.getElementById("sceneimg").src=
	"scene" + curScene + ".jpg";
	
</script>
<img id="sceneimg" src="scene0.jpg" alt=
"Stick Figure Adventure" />
<input type="button" value="1" onClick=
"userChoice(1)">
<input type="button" value="2" onClick=
"userChoice(2)">

</script>

I'm using the autofill forms plugin for firefox which can be found he

https://addons.mozilla.org/en-US/firefox/addon/4775

I use it to automatically fill various web forms, duh. But I would like certain values to be chosend randomly from a list I create.

I contacted the developer and he said the add on probably does not need a new feature because there is a 'dynamic tags' function to fill certain forms with dynamic values (e.g. the current time or date). He has given over the project to another developer and told me I probably would find a solution in a good javascript programming forum.

So here I am! Can anyone help me with this? Basically, I just need a javascript code which chooses on item from an array randomly, I guess? I'm not a programmer myself, so any help would be greatly (!) appreciated.

Thanks a lot in advance for any further guidance!

Note: Here are sample dynamic tags from the plugin:

<datetime> new Date().toLocaleString()
<useragent> navigator.userAgent
<langcode> navigator.language
<resolution> screen.width+'x'+screen.height
<clipboard> this.getClipboardText()

Hi, I want the user to choose one option in each of the radio group. But when I click only one button out of all 12 buttons, it allows the user to submit. How do I change it to a way that the user must click one option for each group in order to allow him/her to submit the form?

Javascript
Code:

function valbutton(thisform) 
{
    // place any other field validations that you require here
    // validate myradiobuttons
    myOption = -1;
    for (i=thisform.myradiobutton.length-1; i > -1; i--)
    {
        if (thisform.myradiobutton[i].checked)
        {
            myOption = i; i = -1;
        }
    }
    
    for (i=thisform.myradiobutton1.length-1; i > -1; i--)
    {
        if (thisform.myradiobutton1[i].checked)
        {
            myOption = i; i = -1;
        }
    }

    for (i=thisform.myradiobutton2.length-1; i > -1; i--)
    {
        if (thisform.myradiobutton2[i].checked)
        {
            myOption = i; i = -1;
        }
    }

    for (i=thisform.myradiobutton3.length-1; i > -1; i--)
    {
        if (thisform.myradiobutton3[i].checked)
        {
            myOption = i; i = -1;
        }
    }
    
    for (i=thisform.myradiobutton4.length-1; i > -1; i--)
    {
        if (thisform.myradiobutton4[i].checked)
        {
            myOption = i; i = -1;
        }
    }

    for (i=thisform.myradiobutton5.length-1; i > -1; i--)
    {
        if (thisform.myradiobutton5[i].checked)
        {
            myOption = i; i = -1;
        }
    }                    

    if (myOption == -1) 
    {
        alert("You must select a radio button");
        return false;
    }

    // place any other field validations that you require here
    thisform.submit(); // this line submits the form after validation
}

HTML

Code:

<p>Cookies</p>
<input type="radio" value="1st value" name="myradiobutton" class="style31" />Enable
<input type="radio" value="2nd value" name="myradiobutton" class="style31" />Enable<br />
<p>Java</p>                                
<input type="radio" value="3rd value" name="myradiobutton1" class="style31" />Enable
<input type="radio" value="4th value" name="myradiobutton1" class="style31" />Enable<br />
<p>Javascript</p>
<input type="radio" value="5th value" name="myradiobutton2" class="style31" />Enable
<input type="radio" value="6th value" name="myradiobutton2" class="style31" />Enable<br />                                   
<p>PHP</p>
<input type="radio" value="7th value" name="myradiobutton3" class="style31" />Enable
<input type="radio" value="8th value" name="myradiobutton3" class="style31" />Enable<br />
<p>C#</p> 
<input type="radio" value="9th value" name="myradiobutton4" class="style31" />Enable
<input type="radio" value="10th value" name="myradiobutton4" class="style31" />Enable<br />
<p>CSS</p>                                     
<input type="radio" value="11st value" name="myradiobutton5" class="style31" />Enable
<input type="radio" value="12nd value" name="myradiobutton5" class="style31" />Enable<br />                                                                                              
<input type="submit" name="submitit" onclick="valbutton(myform);return false;" value="Validate" />
<input type="reset" name="reset" value="Clear" />