function initialize() { //>Initialize fillLists(); // FillLists (base, target) document.getElementById("value").value = ""; // Write into value-field //document.getElementById("value").focus(); // Set focus to value-field document.getElementById("value").select(); // Select 'popup' in value field calculate(); } // Calculate -> '- - - - -' in result function newType() { clearLists(); fillLists(); //>NewType calculate(); setFocus(); } // function newValue() { calculate(); setFocus(); } //>NewValue function newBase() { calculate(); setFocus(); } //>NewBase function newTarget() { calculate(); setFocus(); } //>NewTarget function setFocus() { document.getElementById("value").focus(); } //>SetFocus function clearLists() { //>ClearLists (base, target) var base = document.getElementById("base"); // Get Html-element of the base var target = document.getElementById("target"); // Get Html-element of the target for (var i=base.length-1; i>=0; i--) { // Loop: content of the lists base.options[i] = null; // Void base-item target.options[i] = null; } } // Void target-item function calculate() { //>Calculate var type = document.getElementById("type"); // Html-Element of type (category) var typeID = type.options[type.selectedIndex].id; // ID of the choosen type var input = document.getElementById("value").value; // Content (text) of input-value var white = input.match(/\s*/); // White spaces in input (for opera) var value = parseFloat(input.replace(/,/,'.')); // Parsed string with ','->'.' or NaN var baseValue = document.getElementById("base").value; // Base-value var targetValue = document.getElementById("target").value; // Target-value if (isNaN(value) || (white && input==white)) { // No valid number or only whitespaces document.getElementById("result").value=" - - - - - -"; return; } // -> Clear result value if (typeID=="temperature") { // On Temperature: calculateTemperature(value, baseValue, targetValue); return; } // -> Calculate Temperature var result = value * baseValue / targetValue; // Else: Convert value to result var result = (Math.round(result*1000))/1000 document.getElementById("result").value = result; } // Write result in text-field function validateInput(input, base) { //>ValidateInput (for number systems) var decimal = parseInt(input, base); // Convert input-value->decimal-integer if (isNaN(decimal)) decimal = ""; // No decimal number ->void input-field var valid = decimal.toString(base); // Convert decimal back to base-system document.getElementById("value").value = valid; // Write validated value to input field return valid; } // Return validated value function calculateTemperature(value, base, target) { //>CalculateTemperature var celsius = Number.NaN; // Convert base to celsius if (base=="[F]") celsius = (value-32)*5/9; // [F] -> [C] else if (base=="[C]") celsius = value; // [C] -> [C] else if (base=="[K]") celsius = value-273.15; // [K] -> [C] // [R] -> [C] var result = Number.NaN; // Convert celsius to target if (target=="[F]") result = (celsius*9/5)+32 // [C] -> [F] else if (target=="[C]") result = celsius; // [C] -> [C] else if (target=="[K]") result = celsius+273.15; // [C] -> [K] document.getElementById("result").value = result; } // Write result in text-field function enlist(text, value) { //>Enlist given items to base & target var base = document.getElementById("base"); // Html-Element for Base-Unit var target = document.getElementById("target"); // Target-Unit base.options[base.length] = new Option(text, value); // Set Html-Properties to base target.options[target.length] = new Option(text, value); } // target function fillLists() { //>FillLists var type = document.getElementById("type"); // Get Html-Element of the 'type' var typeID = type.options[type.selectedIndex].id; // Get the ID of the selected type if (typeID=="temperature") { // Temperatures: enlist("Celsius", "[C]"); // [C] is base enlist("Fahrenheit", "[F]"); // [F] = [C]*9/5 + 32 enlist("Kelvin", "[K]"); // [K] = [C] + 273.15 document.getElementById("base").options[1].selected = true; // Preselect farenheit for base document.getElementById("target").options[0].selected = true; } // Preselect celcius for target else if (typeID=="length") { // Lengths: enlist("Metres", 1.0); // 1 [m] is base enlist("Kilometres", 1000.0); // 1 [km] = 1000 [m] enlist("Centimetres", 0.01); // 1 [cm] = 0.01 [m] enlist("Millimetres", 0.001); // 1 [mm] = 0.001 [m] enlist("Microns", 0.000001); // 1 [um] = 0.000001 [m] enlist("Nanometres", 1e-9); // 1 [nm] = 1e-9 [m] enlist("Inches", 0.0254); // 1 [in] = 0.0254 [m] enlist("Feet", 0.3048); // 1 [ft] = 0.3048 [m] enlist("Yards", 0.9144); // 1 [yd] = 0.9144 [m] enlist("Miles", 1609.344); // 1 [mi] = 1609.344 [m] enlist("Nautical Miles", 1852.0); // 1 [n mi] = 1852 [m] enlist("Light Years", 9460730472580800); // 1 [LY] = 9460730472580800 [m] document.getElementById("base").options[8].selected = true; // Preselect miles for base document.getElementById("target").options[1].selected = true; } // Preselect kilometres for target else if (typeID=="area") { // Areas: enlist("Square Metres", 1.0); // 1 [m^2] S is base enlist("Square Kilometres", 1000000.0); // 1 [km^2] = 1000000 [m^2] enlist("Square Centimetres", 0.0001); // 1 [cm^2] = 0.0001 [m^2] enlist("Square Millimetres", 0.000001); // 1 [mm^2] = 0.000001 [m^2] enlist("Hectares", 10000.0); // 1 [ha] = 10000 [m^2] enlist("Acres", 4046.8564224); // 1 [acre] = 4046.8564224 [m^2] enlist("Square Inches", 0.00064516); // 1 [in^2] = 0.00064516 [m^2] enlist("Square Feet", 0.09290304); // 1 [ft^2] = 0.09290304 [m^2] enlist("Square Yards", 0.83612736); // 1 [yd^2] = 0.83612736 [m^2] enlist("Square Miles", 2589988.110336); // 1 [mi^2] = 2589988.110336 [m^2] document.getElementById("base").options[7].selected = true; // Preselect sq feet for base document.getElementById("target").options[0].selected = true; } // Preselect sq metres for target else if (typeID=="volume") { // Volumes: enlist("Cubic Metres", 1.0); // 1 [m^3] is base enlist("Cubic Kilometres", 1000000000.0); // 1 [km^3] = 1000000000 [m^3] enlist("Litres", 0.001); // 1 [dm^3] = 0.001 [m^3] enlist("Millilitres", 0.000001); // 1 [cm^3] = 0.000001 [m^3] enlist("Microlitres", 1e-9); // 1 [mm^3] = 1e-9 [m^3] enlist("Cubic Inches", 0.000016387064); // 1 [in^3] = 0.000016387064 [m^3] enlist("Cubic Feet", 0.028316846592); // 1 [ft^3] = 0.028316846592 [m^3] enlist("Cubic Yards", 0.764554857984); // 1 [yd^3] = 0.764554857984 [m^3] enlist("Gallons (British)", 0.00454609); // 1 [gal-b] = 0.00454609 [m^3] enlist("Gallons (US)", 0.003785411784); // 1 [gal-u] = 0.003785411784 [m^3] enlist("Cups (US)", 0.0002365882365); // 1 [c-us] = 0.0002365882365 [m^3] enlist("Cups (metric)", 0.000250); // 1 [c-me] = 0.000250 [m^3] enlist("Fluid Ounces (US)", 0.0000295735295625); // 1 [fl.oz-us]= 0.00002957352956[m^3] enlist("Pints (US)", 0.000473176473); // 1 [pt-us] = 0.000473176473 [m^3] enlist("Quarts (US)", 0.000946352946); // 1 [qt-us] = 0.000946352946 [m^3] enlist("Tablespoons (US)", 14.7867647825e-6); // 1 [tbsp-us] = 14.7867647825e-6[m^3] enlist("Tablespoons (metric)", 15e-6); // 1 [tbsp-me] = 15e-6); [m^3] enlist("Teaspoons (US)", 4.928921595e-6); // 1 [tsp-us] = 4.928921595e-6 [m^3] enlist("Teaspoons (metric)", 5.0e-6); // 1 [tsp-me] = 5.0e-6 [m^3] document.getElementById("base").options[9].selected = true; // Preselect gallons for base document.getElementById("target").options[2].selected = true; } // Preselect sq litres for target else if (typeID=="time") { // Time: enlist("Seconds", 1.0); // 1 [s] is base enlist("Minutes", 60.0); // 1 [min] = 60 [s] enlist("Hours", 3600.0); // 1 [h] = 3600 [s] enlist("Days", 86400.0); // 1 [d] = 86400 [s] enlist("Weeks", 604800.0); // 1 [wk] = 604800 [s] enlist("Years", 31536000.0); // 1 [a-c] = 31536000 [s] enlist("Decades", 315360000.0); // 1 [dec] = 315360000 [s] enlist("Centuries", 3153600000.0); // 1 [c-c] = 3153600000 [s] enlist("Millennia", 31536000000.0); // 1 [m-c] = 31536000000 [s] enlist("Milliseconds", 0.001); // 1 [m-c] = 31536000000 [s] enlist("Microseconds", 0.000001); // 1 [m-c] = 31536000000 [s] enlist("Nanoseconds", 0.000000001); // 1 [m-c] = 31536000000 [s] document.getElementById("base").options[0].selected = true; // Preselect seconds for base document.getElementById("target").options[1].selected = true; } // Preselect minutes for target else if (typeID=="speed") { // Speed: enlist("Metres per second", 1.0); // 1 [m/s] is base enlist("Metres per minute", 1.0/60.0); // 1 [m/min] = 1/60 [m/s] enlist("Metres per hour", 1.0/3600.0); // 1 [m/h] = 1/3600 [m/s] enlist("Kilometres per second", 1000.0); // 1 [km/s] = 1000 [m/s] enlist("Kilometres per minute", 1000.0/60.0); // 1 [km/min] = 1000/60 [m/s] enlist("Kilometres per hour", 1000.0/3600.0); // 1 [km/h] = 1000/3600 [m/s] enlist("Miles per second", 1609.344); // 1 [mps] = 1609.344 [m/s] enlist("Miles per minute", 1609.344/60.0); // 1 [mpm] = 1609.344/60 [m/s] enlist("Miles per hour", 1609.344/3600.0); // 1 [mph] = 1609.344/3600 [m/s] enlist("Feet per second", 0.3048); // 1 [fps] = 0.3048 [m/s] enlist("Feet per minute", 0.3048/60.0); // 1 [fpm] = 0.3048/60 [m/s] enlist("Feet per hour", 0.3048/3600.0); // 1 [fph] = 0.3048/3600 [m/s] enlist("Inches per second", 0.0254); // 1 [ips] = 0.0254 [m/s] enlist("Inches per minute", 0.0254/60.0); // 1 [ipm] = 0.0254/60 [m/s] enlist("Inches per hour", 0.0254/3600.0); // 1 [iph] = 0.0254/3600 [m/s] enlist("Knots", 1852.0/3600.0); // 1 [kn] = 1852.0/3600 [m/s] document.getElementById("base").options[8].selected = true; // Preselect mph for base document.getElementById("target").options[5].selected = true; } // Preselect kph for target else if (typeID=="mass") { // Mass: enlist("Kilograms", 1.0); // 1 [kg] is base enlist("Grams", 0.001); // 1 [g] = 0.001 [kg] enlist("Metric Tons", 1000.0); // 1 [t] = 1000 [kg] enlist("Long Tons (UK)", 1016.0469088); // 1 [tn] = 1016.0469088 [kg] enlist("Short Tons (US)", 907.18474); // 1 [sh tn] = 907.18474 [kg] enlist("Ounces", 0.028349523125); // 1 [oz] = 0.028349523125 [kg] enlist("Pounds", 0.45359237); // 1 [lb-t] = 0.45359237 [kg] enlist("Stone", 6.35029318); // 1 [st] = 6.35029318 [kg] document.getElementById("base").options[6].selected = true; // Preselect pounds for base document.getElementById("target").options[0].selected = true; } // Preselect kilograms for target else if (typeID=="power") { // Power: enlist("Joules per second", 1.0); // 1 [J/s] = 1.0 [Nm/s] is base enlist("Kilojoules per hour", 1000.0/3600.0); // 1 [kJ/h] = 1000.0/3600.0 [Nm/s] enlist("Watts", 1.0); // 1 [W] = 1.0 [Nm/s] enlist("Kilowatts", 1000.0); // 1 [kW] = 1000.0 [Nm/s] enlist("Megawatts", 1000000.0); // 1 [MW] = 1000000.0 [Nm/s] enlist("Kilocalories per hour", 4186.8/3600.0); // 1 [kcal/h]= 1.16263888888889 [Nm/s] enlist("Horsepower", 745.69987158227022); // 1 [HP] = 745.699871582270 [Nm/s] enlist("Manpower", 74.569987158227022); // 1 [MP] = 74.5699871582270 [Nm/s] enlist("Newtonmeter per second", 1.0); // 1 [Nm/s] document.getElementById("base").options[6].selected = true; // Preselect horsepower for base document.getElementById("target").options[3].selected = true; } // Preselect kilowatts for target else if (typeID=="energy") { // Energy: enlist("Joules", 1.0); // 1 [J] = 1.0 [Nm] is base enlist("Kilojoules", 1000.0); // 1 [kJ] = 1000.0 [Nm] enlist("Watt seconds", 1.0); // 1 [Ws] = 1.0 [Nm] enlist("Watt hours", 3600.0); // 1 [Wh] = 3600.0 [Nm] enlist("Kilowatt hours", 3600000.0); // 1 [kWh] = 3600000.0 [Nm] enlist("Calories", 4.1868); // 1 [cal] = 4.1855 [Nm] enlist("Kilogram Calories", 4186.8); // 1 [C, kcal]= 4185.5 [Nm] enlist("Newton-Metres", 1.0) // 1 [Nm] is base document.getElementById("base").options[2].selected = true; // Preselect watt seconds for base document.getElementById("target").options[6].selected = true; } // Preselect kilogram calories for target else if (typeID=="pressure") { enlist("Kilograms/Square Meter", 1.0); enlist("Pounds/Square Foot", 4.88242764); enlist("Pounds/Square Inch", 703.06957963916318); enlist("Atmospheres", 10332.2745); enlist("Bars", 10197.1621); enlist("Centimeters of Mercury", 135.950981); enlist("Inches of Mercury", 345.31554); enlist("Pascals", 9.80665000000000); document.getElementById("base").options[2].selected = true; // Preselect pounds per sq inch for base document.getElementById("target").options[0].selected = true; } // Preselect kg per sq meter for target }