Print var from url

index.html

<span><script>document.write(name+' '+middlename+' '+ lastname)</script></span>
<span><script>getQueryVariable("n");</script></span>

script.js

//URL: http://www.sysetup.com/?n=xxx&m=yyy&l=zzz

var name = getQueryVariable("n");
var middlename = getQueryVariable("m");
var lastname = getQueryVariable("l");

function getQueryVariable(variable){
    var query = window.location.search.substring(1);

    try { 
        query = decodeURI(query); 
    } catch(e) { 
        console.error(e); 
    }

    var vars = query.split("&");
    for (var i=0;i<vars.length;i++) {
            var pair = vars[i].split("=");
            if(pair[0] == variable){return pair[1];}
    }
    return(false);
}