Conditional If/Else statement using two conditions

Hello,

I am trying to write a conditional if/else statement that puts a text value in a box 3 when specific conditions in box 1 and box 2 are met. Box 1 and 2 are drop down boxes with set values.

I've tried searching all over the web and have probably rewritten it at least 10 different times. At one point I was able to get it working with only one of the boxes factored into the code but my computer crashed and I lost that part.

Here's what I have:

var n1 = this.getField("likelihood").value:

var n2 = this.getField("consequence").value;

if ((n1.value=='N/A') && (n2.value=='N/A')) {

     event.value = 'N/A'

} else if ((n1=='Not Likely') && (n2=='Insignificant') {

     event.value = 'Low'

}

This would continue on another 14 times to account for the various combinations that can be chosen using box 1 and box 2. I have also tried placing it in the 2nd combo box as an action item but still no luck. Any help would be much appreciated.