Question

I’m trying to create a JavaScript lease calculator where a user will enter an input (purchase price) and based on the amount that is input will produce a calculation (which further I will add a range to go a certain percentage higher and lower than the calculated number).

Here is an example from my javascript:

<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function aplusb(form) {

a=eval(Calc.num1.value)

if (a < 1000)
  {
  b= 0.05372
  c=a * b
  Calc.Input.value = c
  Calc.Input2.value = c - (c * 0.15)
  Calc.Input3.value = c + (c * 0.15))
  }
else if (1001 < a < 2000)
  {
  b= 0.04875
  c=a * b
  Calc.Input.value = c
  Calc.Input2.value = c - (c * 0.15)
  Calc.Input3.value = c + (c * 0.15))
  }
else
  {
  b= 0.04689
  c=a * b
  Calc.Input.value = c
  Calc.Input2.value = c - (c * 0.15)
  Calc.Input3.value = c + (c * 0.15))
  }
}

</script>

and the html i’m using to call the script

<form name="Calc" action="--WEBBOT-SELF--" method="POST">
<p>

Enter Purchase Price:
<input type="text" name="num1" size="12" tabindex="1">

<br> Calculation: <input type="text" name="Input" size="17" tabindex="4">

Range
<input type="text" name="Input2" size="17" tabindex="4">
<input type="text" name="Input3" size="17" tabindex="4">

</p>
<input type="button" name="sum"  value="Calculate" OnClick="aplusb(this.form)" tabindex="3">
</form>

The script works fine if it’s just doing the same calculation on any number, but as soon as I add the “if” command, it doesn’t work after that. Essentially there will be a group of about 10 if else commands.
Any help would be much appreciated! Thanks!

Answer 1

Your main problem is the lack of semicolons and the lines with double )) such as:

Calc.Input3.value = c + (c * 0.15))

Fixed with:

Calc.Input3.value = c + (c * 0.15);

Here is a fixed version: http://jsbin.com/atelen/edit#preview