Help me to check error
<!DOCTYPE html>
<html>
<head>
<script type = "text/JavaScript">
var count, str, intcount, intnum, num;
str="";
for(intcount = 0; intcount < 5 ; ++intcount){
num = window.prompt("Enter integer" + (intcount+1) + ":", "");
intnum = parseInt(num);
if(intnum % 2 ==0){
str += intnum + "";
count = count + 1;
}
}
window.alert("There are " + count + " even number: " + str);
</script>
</head>
<body>
</body>
</html>