function WindChillCalculator(form) { var windchill = document.getElementById('windchill'); windspeed=eval(form.windspeed.value); localtemp=eval(form.localtemp.value); wc=(35.74+0.6215*localtemp-35.75*Math.pow(windspeed,0.16)+0.4275*localtemp*Math.pow(windspeed,0.16)); wc=" " + Math.round(wc) + " °F"; wc=((windspeed <= 3) || (windspeed >= 110 )) ? "Wind speeds must be greater than 3 Mph and less than 110 Mph." : wc; wc=((localtemp <= -50) || (localtemp >= 50)) ? "Local Temperature must be be greater than -50 °F and less than 50 °F": wc; if(wc==" NaN °F"){ wc="Please Enter Wind Speed & Temperature!"; } windchill.innerHTML = wc; }