dec2bin.js

function dec2bin(num){
	var arr = [] , rem =0 , count = ""; 
  var n = num;
  
  while( n > 0){
  	rem = Math.floor(n % 2);
    arr.push(rem);
    n = Math.floor(n /2);
  }
	//alert(arr);
  while(arr.length !==0){
  	count += arr.pop();
  }
  return count;
}
alert(dec2bin(10));