function validate(theForm ) { if ( checkDate( theForm.sDay.value, theForm.sMonth.selectedIndex, theForm.sYear.value) != true) return false; if ( checkDate( theForm.eDay.value, theForm.eMonth.selectedIndex, theForm.eYear.value) != true) return false; // check for pre-1970 if ((theForm.sYear.value < 1970) || (theForm.eYear.value < 1970)) return false; return true; } function calcCost( period, theForm) { if (validate(theForm) != true) { return -1; } var vehicle = hireList[theForm.vehicle.selectedIndex]; var vType = vehicle.name; var today = new Date(); var sDate = new Date( theForm.sYear.value, theForm.sMonth.selectedIndex, theForm.sDay.value); var eDate = new Date( theForm.eYear.value, theForm.eMonth.selectedIndex, theForm.eDay.value); // now calculate difference between two var diff = eDate-sDate; // express difference in days diff = (diff / (24*60*60*1000)); // alert('diff =' + diff + '\ntoday =' + today + '\nsDate =' + sDate + '\neDate =' + eDate + '\nVehicle =' + vehicle); if ((sDate < today) || (diff <= 0)) { return -1; } sDate.setHours(8); eDate.setHours(8); period["weeks"] = Math.floor(diff / 7); period["days"] = Math.round(diff % 7); var cost = 0; if (period["weeks"] > 0) { cost = vehicle.weekRate * period["weeks"]; } if (period["days"] > 0) { cost += vehicle.dayRate * period["days"]; } cost = twoPlaces( cost); return( cost) } function doQuote() { var period = new Array(); var str = ''; var cost = -1; cost = calcCost( period, document.hire); if (cost >= 0) { document.hire.cost.value = 'Ł' + cost; if (period["weeks"] > 0) { str += period["weeks"] + ' weeks'; } if (period["days"] > 0) { str += ' ' + period["days"] + ' days'; } document.hire.period.value = str; } else { document.hire.cost.value = '------'; document.hire.period.value = '-----------'; } } function selMonth( fname, arr, sel) { var str=''; if (sel < 0) { str += ''; } for ( var i = 0; i < arr.length; i++) { if (sel == i) { str += '