code.js

<input id="generator" type="button" value="Generate!" />
<p>Locus options here:</p>
<select name="theMenu" id = "setMenu">
<option selected value="real">Real Set</option>
<option value="real1">Real + Fake Set 1</option>
<option value="real2">Real + Fake Set 2</option>
<option value="real1_2">Real + Fake Set 1 and 2</option>
</select>


function whichGenes(){
	foo = document.getElementById("setMenu");
	if (foo == 'real'){
		maybeLocus = geneSet;
	} else if (foo == 'real1'){
		maybeLocus = geneSet + fakeSet1;
	} else if (foo == 'real2'){
		maybeLocus = geneSet + fakeSet2;
	} else if (foo == 'real1_2'){
		maybeLocus = geneSet + fakeSet1 + fakeSet2;
	};
};

//the button makes whichGenes() go, among other things.