Basic Loot

<!DOCTYPE html>
<html>
<body>

<h2>Loot Box Simulator (Basic Crate)</h2>

<p id="demo"></p>

<script>
var basicLoot = [
	{
    	id: "UM_200",
        v: 0.980,
        um: 200,
    },
    {
    	id: "Hero_1",
        v: 0.930,
        um: 250,
    },
    {
    	id: "Mat_1",
        v: 0.785,
        um: 10,
    },
    {
    	id: "Mat_2",
        v: 0.735,
        um: 50,
    },
    {
    	id: "Equip_1",
        v: 0.685,
        um: 120,
    },
    {
    	id: "Travel_1",
        v: 0.495,
        um: 2.777777778,
    },
    {
    	id: "Travel_2",
        v: 0.395,
        um: 5.555555556,
    },
    {
    	id: "Travel_3",
        v: 0.345,
        um: 8.333333333,
    },
    {
    	id: "Popu_100",
        v: 0.165,
        um: 1.25,
    },
    {
    	id: "Popu_500",
        v: 0.065,
        um: 6.25,
    },
    {
    	id: "Popu_1000",
        v: 0.015,
        um: 12.5,
    },
    {
    	id: "Popu_5000",
        v: 0.00,
        um: 62.5,
    },
];

var result = [];
for (var i=0; i<basicLoot.length; ++i) {
	var data = {
    	name: basicLoot[i].id,
        amount: 0,
    };
    result.push(data);
}
var box_cost = 100;
var box_amount = 100;

for (var i=0; i<box_amount; ++i) {
	for (var j=0; j<5;j++) {
      var r = Math.random();
      var prize = undefined;
      for (var k=0; k<basicLoot.length; ++k) {
          if (prize===undefined) {
              if (r >= basicLoot[k].v) prize = k;
          }
      }
      result[prize].amount=result[prize].amount+1;
      }
}
var totalUM=0;
var toPrint="Number of Box: "+box_amount+"</br>";
toPrint+= "Total UM Spent: "+(box_cost*box_amount)+"</br></br>";
for (var i=0; i<basicLoot.length; ++i) {
	toPrint+=result[i].name;
    toPrint+=": ";
    toPrint+=result[i].amount;
    toPrint+= "</br>";
    totalUM+=result[i].amount * basicLoot[i].um;
}
toPrint+= "</br>";
toPrint+= "Total UM Received in Value: "+totalUM;
document.getElementById("demo").innerHTML = toPrint;
</script>

</body>
</html>