Please Help! JavaScript Problem :(

I been working on a educational game for my school and I'm stuck with this:

It displays all the functions except just one random one. Can anyone help me fix this or give me a new more efficient code?

var whichEvent=get_random();

    var event=new Array(4)
     event[0]=Robbery();
     event[1]=Hurricane();
     event[2]=Tornado();
     event[3]=Reward();

event[whichEvent];

Code (markup):

function get_random()
{
    var ranNum= Math.floor(Math.random()*4);
    return ranNum;
}

Code (markup):

 

When you are creating your array, you run every single "event" function.

Try this:

function get_random() {
    var ranNum= Math.floor(Math.random()*4);
    if (ranNum == 0) Robbery();
    if (ranNum == 1) Hurricane();
    if (ranNum == 2) Tornado();
    if (ranNum == 3) Reward();
}

Code (markup):

 

Thanks so much! That was a huge help!

 

Avoid calling anything event, since I.E. uses window.event.

<script type='text/javascript'>
function Robbery(){alert('Robbery')}
function Hurricane(){alert('Hurricane')}
function Tornado(){alert('Tornado')}
function Reward(){alert('Reward')}

var eventArray=[Robbery,Hurricane,Tornado,Reward];

function get_random(funcTable)
{
  funcTable[ Math.floor( Math.random()*funcTable.length ) ]();
}

get_random(eventArray);

</script>

Code (markup):

 

Thanks so much