$(document).ready(function() {
	
	$("#calculate").click(function(){
		
		var L,P,n,c,dp;
		
		L = parseInt($("#principle_js").val());
		
		n = parseInt($("#length_js").val()) * 12;
		
		c = parseFloat($("#interest_js").val())/1200;
		
		dp = 1 - parseFloat($("#dp_js").val())/100;
		
		L = L * dp;
		
		P = (L*(c*Math.pow(1+c,n)))/(Math.pow(1+c,n)-1);

		$("#payment").html(P.toFixed(2));

	return false;

	}); 
	
});