function nav(){

                var resultPage=document.sitebar.siteChoice;

                for (var i = 0; i < document.sitebar.siteChoice.length; i++)

                        {

                                if (resultPage.options[i].selected == true)

                                        if (resultPage.options[i].value != "")

                                                parent.location.href=resultPage.options[i].value;

                        }

        }function navMe(i){

                var modelPage=document.modelbar.pageSelect;

                for (var i = 0; i < document.modelbar.pageSelect.length; i++)

                        {

                                if (modelPage.options[i].selected == true)

                                {       var strModel = modelPage.options[i].value

                                        if (strModel != "")

                                        {       

                                                if (strModel.substring(11, 19) == "brochure")

// this IF stmt determines if the path contains the string "brochure".  If it does, it parses the string and reconstructs it with an appended querystring, which is passed to the Brochure MainPage, which 'checks' the appropriate checkbox on the Brochure page.

                                                        strModel = "/models/" + strModel.substring(8,10) + "/brochure/default.asp?car=" + strModel.substring(8,10);

                                                parent.location.href = strModel;

                                        }

                                }

                        }

        }

function floor(number)
{
  return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}

function dosum()
{
  var mi = document.temps.IR.value / 1200;
  var base = 1;
  var mbase = 1 + mi;
  for (i=0; i<document.temps.YR.value * 12; i++)
  {
    base = base * mbase
  }
  document.temps.PI.value = floor(document.temps.LA.value * mi / ( 1 - (1/base)))
  document.temps.MT.value = floor(document.temps.AT.value / 12)
  document.temps.MI.value = floor(document.temps.AI.value / 12)
  var dasum = document.temps.LA.value * mi / ( 1 - (1/base)) +
        document.temps.AT.value / 12 + 
        document.temps.AI.value / 12;
  document.temps.MP.value = floor(dasum);
}