<!DOCTYPE html>
<html>
<body>
<p>Click the button to replace "Microsoft" with "W3Schools" in the paragraph below:</p>
<p id="demo">Your Answer</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var resout="1.OrderNumber=123412&1.Item=&1.Project=&1.Seiban=&1.OrderStatus=0"
var res = resout.split("1.");
alert(res);
document.getElementById("demo").innerHTML = res;
}
</script>
</body>
</html>
copy paste above code in html file and check possibly it helps . it convert your string to string array which shown separated by comma and you can access it by index also
as alert(res[0]); gives you "OrderNumber=123412&" string.