What is wrong in the jquery code?

I have been struggling in fixing this code, wonder what is wrong at all...

var tips = "<p class="adobe-reader-download">Most computers will open PDF documents automatically, but you may need to download <a title='Link to Adobe website-opens in a new window'";
tips +=" href='http://www.adobe.com/products/acrobat/readstep2.html' target='_blank'>Adobe Reader</a>.</p>";


if($("div#maincontent a[href*='.pdf']").length>0){
    $("div#maincontent").children(":last-child").after(tip);

From stackoverflow

• You are using double quotes here at where it says adobe-reader-download

  var tips = "<p class="adobe-reader-download">
  

  Try this:

  var tips = "<p class=\"adobe-reader-download\">
  

  Note: If you use single quotes for your entire string, you won't need to escape double quotes.