How do I emtpy variable/trun variable back to undefined?
<p>I have a case where I check if a variable is undefined. in some instances I would like to trun the variable undeined again, so that it returns as undefined? Would this be concidered bad practice?</p>

<p>\:D/ code sample! </p>

<pre><code>if (loc1 == undefined){
    loc1 = loc.title
    }
else if(loc2 == undefined){
    loc2 = loc.title
}
else{
//here I want loc1 and loc2 to turn undifined again!
}
</code></pre>
