topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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lib-js-math-calculator-area-2.htm / htm



  
  <!-- TWO STEPS TO INSTALL AREA CALCULATOR 2:
  
    1.  Copy the coding into the HEAD of your HTML document
    2.  Add the last code into the BODY of your HTML document  -->
  
  <!-- STEP ONE: Paste this code into the HEAD of your HTML document  -->
  
  <HEAD>
  
  <SCRIPT LANGUAGE="JavaScript">
  
  <!-- This script and many more are available free online at -->
  <!-- The JavaScript Source!! http://javascript.internet.com -->
  <!-- Original:  Matthew d. Krieg (battlebots102001@yahoo.com) -->
  <!-- Web Site:  http://geocities.com/battlebots102001/javascript_gizmos/index.htm -->
  
  <!-- Begin
  var formulas = new Array()
  formulas["square"] = "Math.pow(num_one,2)";
  formulas["rectangle"] = "num_one * num_two"
  formulas["parallelg"] = "num_one * num_two";
  formulas["triangle"] = "num_one * num_two / 2";
  
  function getCheckedNum()
  {
  var selected;
  for(var loop=0;loop<window.document.convert.to_which.length;loop++)
  {
  if(window.document.convert.to_which[loop].checked == true)
  {
  selected = loop;
  }
  }
  return selected;
  }
  function calculate(num_one,num_two)
  {
  if((isNaN(parseInt(num_one))) || (isNaN(parseInt(num_two))))
  {
  alert('You must enter numbers');
  return;
  }
  var selected_index = getCheckedNum();
  var selected_value = window.document.convert.to_which[selected_index].value;
  if((selected_value == "square") && (num_one != num_two))
  {
  alert('Your square is not square');
  return;
  }
  formula = formulas[selected_value];
  var answer = eval(formula);
  alert(answer);
  }
  //  End -->
  </script>
  
  </HEAD>
  
  <!-- STEP TWO: Copy this code into the BODY of your HTML document  -->
  
  <BODY>
  
  <div align="center">
  <form name="convert">
      Find the area of a:<br>
        <input type="radio" checked="yes" name="to_which" value="square">square<br>
        <input type="radio" name="to_which" value="rectangle">rectangle<br>
        <input type="radio" name="to_which" value="parallelg">parallelogram<br>
        <input type="radio" name="to_which" value="triangle">triangle<br>
      The base is: <input type="text" size="5" name="base">   The height is: <input type="text" size="5" name="height"><br>
      <input type="button" value="calculate" onclick="calculate(window.document.convert.base.value,window.document.convert.height.value);">
  </form>
  </div>
  
  <p><center>
  <font face="arial, helvetica" size"-2">Free JavaScripts provided<br>
  by <a href="http://javascriptsource.com">The JavaScript Source</a></font>
  </center><p>
  
  <!-- Script Size:  2.44 KB -->
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 20/2/2008

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