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Passing Bash variable to javascript

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# 1  
Old 04-12-2010
Passing Bash variable to javascript
How do I pass a bash variable to a javascript?
I've tried
Code:
#!/bin/bash
echo "Content-type: text/html"
echo ""
echo "<html>"
echo "<head>"
counter=0
echo '<script>
window.parent.document.forms[0].counter.value = "$counter";  
</script>'

I have an iframe script which I am trying to pass a counter to the parent. All I get to display on the parent page is:
Code:
$counter

I've tried many variations for the varible like:
Code:
\'$counter\'
[ "$counter" ]
("$counter")

# 2  
Old 04-12-2010
Did you try putting the echo in double quotes? i.e.

Code:
$ cat JS1
counter=3
echo "<script>
window.parent.document.forms[0].counter.value = '$counter';  
</script>"

$ ./JS1
<script>
window.parent.document.forms[0].counter.value = 3;
</script>

# 3  
Old 04-12-2010
http headers are supposed to be \r\n terminated, not just \n (which is what your echo statements are doing). Probably unrelated to your javascript question, but it may save you debugging time.
# 4  
Old 04-12-2010
Thank you scottn, works like a charm. Also, thanks alister for pointing out my html mistake.
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