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Small carparking script needs "FULL" alert, need advice please...

P: 1
Hi to all.

I am so new in this, I don't know how to finish my homework-question. I have to go to bed now ánd need to find an answer a.s.a.p. Who is willing to help this Dutch boy?

I have to count the number of cars in a carparking. So far so good. But:
If number of cars >100 there should popup an alert "GARAGE FULL"
If number of cars =0 there should popup an alert "GARAGE EMPTY"
This is how far I have come in 4 hours. ;-)

Expand|Select|Wrap|Line Numbers
  1. <html>
  2. <head>
  3. <title>Carparking</title>
  4. <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
  5. <meta name="generator" content="HAPedit 3.1">
  6. </head>
  7. <body bgcolor="#ABCDDE">
  8. Carparking <br><br>
  9. <input type="submit" value="car driving in" onclick="document.getElementById('vak').value++; return false;" /> <br />
  10. <input type="submit" value="auto driving out" onclick="document.getElementById('vak').value--; return false;" /> <br />
  11. <input type="text" id="vak" value="0" /> the number of cars in the carparking
  12. <br /><br />
  13. </body>
  14. </html>

Dec 11 '09 #1
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1 Reply

Expert Mod 5K+
P: 8,639
you need a mandatory check before the in/decrease, whether the target value is within the limits.
Dec 11 '09 #2

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