<!DOCTYPE html>
 <html lang="en">
 <head>
<meta charset="UTF-8">
<title></title>
 <script>
 var prime = function(len){
     var i,j;
     var arr = [];
   for(i = 1; i < len; i++){
     for(j=2; j < i; j++){   
       if(i%j === 0) {
          break;
       }
     }
     if(i <= j && i !=1){ 
       arr.push(i);
     }
    
   }
   return arr;
 };
 console.log(prime(1000));
 document.write(prime(1000));
 </script>
 </head>
 <body>