I need help with random quote generator project

var quotes = [
    {
        quote: " I enjoy fun. I both have fun and can be fun. But when it's about serious things  I am serious",
        source: "Me myself and I",
        citation: "www.brainyquote.com",
        tags: ["Inspirational" ,  "Strength"]
    },........
]

document.getElementById('loadQuote').addEventListener("click", printQuote, false);

function printQuote(){
     document.getElementById("quote-box").innerHTML =   '<p class="quote">' +  quotes[getRandomNr()].quote + '</p>'
                +  '<p class="source">' + quotes[getRandomNr()].source + '<span class="citation">'+ quotes[getRandomNr()].citation + '</span></p>'
                + '<p><span class="tag">' + quotes[getRandomNr()].tags[0]   +' </span> <span class="tag">' + quotes[getRandomNr()].tags[1] + '</span></p>' ;  

}

function getRandomNr () {
     var randomNr = Math.floor(Math.random() * quotes.length);
     return randomNr;
} 

getRandomNr();

document.getElementById('loadQuote2').addEventListener("click", printRandomQuote, false);

var viewedQuotes = [];                                      // array to hold viewed quotes

function getRandomQuote() {
  if (quotes.length == 0)                                   // if empty, reload the main list
    quotes = viewedQuotes.splice(0, viewedQuotes.length);   // (and empty viewed list)
  var randNum = Math.floor(Math.random() * quotes.length);  // pick a quote at random
  var quote = quotes.splice(randNum, 1)[0];                 // take it out of the main list
  viewedQuotes.push(quote);                                 // now add it to the "viewed" list
  return quote;                                             // return the chosen quote
}

//getRandomQuote(quotes); 

 function printRandomQuote(){
    //console.log('heloo');
     document.getElementById("quote-box").innerHTML =   '<p class="quote">' +  getRandomQuote().quote + '</p>'
                +  '<p class="source">' + getRandomQuote().source + '<span class="citation">'+ getRandomQuote().citation + '</span></p>'
                + '<p>'+ taguri  + '</p>';  

}

for(i=0; i<= getRandomQuote().tags.length; i++){
     var taguri = '<p><span class="tag">' + getRandomQuote().tags[i] +'</span>'; 
}