$(document).ready(function(){

    var tabbed_content_len = $("#package-info .middle").length;

    $("#package-info a.tab").click(function(){

        $("#package-info #package-tab-select a").each(function(){

            $(this).removeClass("active");

        });

        $(this).addClass("active");

        $("#package-info .middle").each(function(){

            $(this).hide();

        });

        $("#" + $(this).attr("rel")).show();

    });

    $("#edit-generate-conference-id").click(function(){

        if($("#edit-email-address").attr('value').length <= 0){ return false; }

        $("#edit-conference-id").attr("value", "Generating...");

        $.get("/now/check-email/" + $("#edit-email-address").attr('value'), function(data){

            if(data){

                $(".messages").remove();
                $(data).prependTo(".column-left");
                $("#edit-conference-id").attr("value", "");
                
            }else{
                
                $.get("/now/generate-conference-id/" + $("#edit-email-address").attr('value'), function(conference_id){

                    $(".messages").remove();
                    $("#edit-conference-id").attr("value", conference_id);
                    
                });

            }
            

        });

  
       return false;

    });

    $("#edit-submitted-email").blur(function(){

        if($(this).attr('value').length <= 0){ return false; }

        $.get("/conference/check-email/" + $(this).attr('value'), function(data){

            if(data){

                $("#edit-submitted-email-wrapper .description").html(data).show();

            }else{

                $("#edit-submitted-email-wrapper .description").hide();

            }

        });

    });

    $("#edit-submitted-confirm-email").blur(function(){

        if($(this).attr('value') != $("#edit-submitted-email").attr('value')){

            $("#edit-submitted-confirm-email-wrapper .description").html('<p>Emails do not match!</p>').show();

        }else{

            $("#edit-submitted-confirm-email-wrapper .description").html('<p class="verified">Emails match!</p>').show();

        }

    });

});

function isNumber(strNumber) {
      // valid chars for number
      var strValid = "0123456789.";
      for (i=0; i<strNumber.length; i++) {
        // go through each char in string
        if (strValid.indexOf(strNumber.charAt(i)) < 0) {
          return false;
        }
      }
      return true;
    }
function RoundToNdp(X, N) { var T = Math.pow(10, N)
  return Math.round(X*T)/T }

function calculate()
{
	// Constant values are taken from the http://www.defra.gov.uk/environment/business/envrp/pdf/conversion-factors.pdf
	//var petrolcar=0.29;
	var petrolcar=0.2095; // table 6a. avg of petrol car
	
	//var dieselcar=0.27;
	var dieselcar=0.1987;	// avg of diesel car
	//var railtravel=0.0249;
	//  value of National rail from table 8
	var railtravel=0.6502;
	
	var airlong=0.1056;	//table 9
	var airshort=0.1304;
	var rfi=1.91;
	var grEms=2;
	var rfi1=1.9;
	
	var tot_co2= new Number(0);
	var temp=0;
	var co2form=document.forms["co2form"];
	var tonnConve=1000;
	if(isNumber(co2form.petrolcar_miles.value))
	{
		temp=co2form.petrolcar_miles.value * petrolcar;
		temp=temp/tonnConve;
		co2form.petrolcar_co2.value=temp;
		//co2form.petrolcar_co2.value	= RoundToNdp(temp,4);
		tot_co2=Number(tot_co2) + Number(temp);
	}
	if(isNumber(co2form.dieselcar_miles.value))
	{
		temp=co2form.dieselcar_miles.value * dieselcar;
		temp=temp/tonnConve;
		//		co2form.dieselcar_co2.value=temp;
		co2form.dieselcar_co2.value	= RoundToNdp(temp,4);
		tot_co2=Number(tot_co2) + Number(temp);
	}
	if(isNumber(co2form.railtravel_miles.value))
	{
		temp=co2form.railtravel_miles.value * railtravel
		temp=temp/tonnConve;
		//co2form.railtravel_co2.value
		co2form.railtravel_co2.value	= RoundToNdp(temp ,4);
		tot_co2=Number(tot_co2) + Number(temp);
	}
	if(isNumber(co2form.airlong_miles.value))
	{
		//temp=co2form.airlong_miles.value * airlong
		temp=co2form.airlong_miles.value * airlong * rfi * grEms
		temp=temp/tonnConve;
		co2form.airlong_co2.value	= RoundToNdp(temp ,4);
		tot_co2=Number(tot_co2) + Number(temp);
	}
	if(isNumber(co2form.airshort_miles.value))
	{
		//temp=co2form.airshort_miles.value * airshort
		temp=co2form.airshort_miles.value* airlong * rfi1 * grEms
		temp=temp/tonnConve;
		co2form.airshort_co2.value	= RoundToNdp(temp ,4);
		tot_co2=Number(tot_co2) + Number(temp);
	}
	//alert(tot_co2)
	co2form.tot_co2.value=RoundToNdp(tot_co2,4);
	co2form.tot_co2half.value=(RoundToNdp(tot_co2,4))/2;
}