Get var from an URL. JavaScript

app.js

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);
}

var name = getQueryVariable("n");