$(document).ready(function(){ 

	$("#calculate").click(function () {
		
		var yard = 1760;
		var total_yard;
		
		var price1=2.3;
		var price2=3.45;
		var price3=4.00;
		
		var sub_price1=0.20;
		var sub_price2=0.30;
		var sub_price3=0.40;
		
		var soiling=50;
		
		var ans1,ans2,ans3;
		
		var miles = document.getElementById('miles').value;
		total_yard = miles*yard;
		
		ans1 = ((total_yard-450)/261)*sub_price1 + price1;
		ans2 = ((total_yard-450)/261)*sub_price2 + price2;
		ans3 = ((total_yard-450)/261)*sub_price3 + price3;
		
		if(document.getElementById('over').value>4)
		{
			ans1= ans1+((ans1*50)/100);
			ans2= ans2+((ans2*50)/100);
			ans3= ans3+((ans3*50)/100);
		}
		
		var selected = $("#time").val();
		var miles = $("#miles").val();
		
		if(miles < 1){
			
			jAlert("Please enter a mileage.","Error");	
			
		} else {
		
			if(selected==1){
				jAlert('You journey will cost you roughly £'+roundNumber(ans1,2)+"\n\nPlease note, this is only an estimate! The actual fair is metered and may be more or less.","Your journey..");
			}
			if(selected==2){
				jAlert('You journey will cost you roughly £'+roundNumber(ans2,2)+"\n\nPlease note, this is only an estimate! The actual fair is metered and may be more or less.","Your journey..");
			}
			if(selected==3){
				jAlert('You journey will cost you roughly £'+roundNumber(ans3,2)+"\n\nPlease note, this is only an estimate! The actual fair is metered and may be more or less.","Your journey..");
			}
		
		}
		
	});

});

function roundNumber(num, dec) {
	var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
	return result;
}