Insert char in a string

by Radhika Magaji

HTML

<body>

<div id="demo">
</div>
</body>

JavaScript

var a = "25000";
	var b = ",";
	var position = -3;
	var output = [a.slice(0, position), b, a.slice(position)].join('');
	//alert(output);
	//document.getElementById("check").innerHTML = output;
	
	var reg = "25,000";
	var dis = "5,000"
	var Pointsdiff = (reg.replace(",",""))-(dis.replace(",",""));
	var check = Pointsdiff.toString();	
			alert(check);
			alert(typeof reg+"reg");
			alert(typeof Pointsdiff+"difference");
			alert(typeof check);
			var insert = ",";
			var position = -3;
			var resultPointsdiff = [check.slice(0, position), insert, check.slice(position)].join('');
			/*$('#sumPrice').html('<span class="strike">' + bookObject.reservationResponse.tripSummary.regularPrice + '</span>'
					+ " " + Pointsdiff + " Points");*/
					alert(resultPointsdiff);