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Dec 11th, 2018
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  1. <!DOCTYPE html>
  2. <html>
  3.     <head><title>Temperature</title></head>
  4.     <body>
  5.         <p>Fahrenheit:
  6.         <input id="txtFah" type="text" style="background-color: lime" />
  7.         <input id="btnCalc" type="button" value="Calculate" onclick="btnCalc_OnClick()" /><br>
  8.         <input id="btnAdd" type="button" value="+1" onclick="btnAdd_OnClick()"/>
  9.         <input id="btnSub" type="button" value="-1" onclick="btnSub_OnClick()"/>
  10.         </p>
  11.         <p id="parCel" style="background-color: Yellow; width: 100px;">0</p>
  12.     </body>
  13. </html>
  14.  
  15. <script language="JavaScript">
  16.     function btnCalc_OnClick()
  17.     {
  18.         parCel.innerText = ((txtFah.value - 32) * 5) / 9;
  19.     }
  20.  
  21.     function btnAdd_OnClick()
  22.     {
  23.         txtFah.value = parseInt(txtFah.value)+1;
  24.     }
  25.  
  26.     function btnSub_OnClick()
  27.     {
  28.         txtFah.value = parseInt(txtFah.value)-1;
  29.     }
  30. </script>
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