Unwanted string-to-object conversion when passing function argument

[Tails]

The script below creates variable 'n' with the value "str". When I document.write a <select> element with an onchange() attribute, I feed the onchange() event the variable n. I expect it to be passed as a string, but for some reason it's passed as an object and I get an 'str is undefined'. I tried using n.toString() for extra assurance, I tried using escaped quotes into the document.write thinking they would let it be parsed as a string after the write, but nothing works.


<form action="">

<script type="text/javascript">
function test(X)
{
//alert(X)
//alert(typeof(X))
}


n="str"
document.write('<select onchange="test('+n+')"><option value="0">Sonic</option><option value="1">Tails</option></select>')
</script>

</form>


For the record, the real page is at http://xfox.digibase.ca/re/gen/skc
Each row of <select>'s and checkboxes at the top are dynamically written with some nested loops. I'm trying to assign IDs with a naming scheme relating to the loop increments (each would be a unique ID). And each <select> tag would have an onchange() event with the loop counts passed on. The function called should uncheck the appropriate checkbox (the one in the row). It seems the problem is a limitation in which it parses the document.write, then the innerHTML, and then the arguments in the attributes such as onchange(). Using 'this' when passing document.write functions is another nightmare.

[nolachrymose]

You're not passing the parameter as a string for the onchange event. It's as if you're calling:

onchange="test(str);"

...which is not what you want. You must have quotes surrounding the variable for it to pass as a string.

document.write('<select onchange="test(\''+n+'\')"><option value="0">Sonic</option><option value="1">Tails</option></select>')

Hope that helps!

Happy coding! :)

[Tails]

The problem with that is that it reports it as "invalid character." But even if that wasn't the case, it would probably think I passed "n" as a string instead of parsing variable n.

EDIT: It works ^_^.
(\''+n+\'') doesn't work (simple string escapes outside instead of inside), but
('\'+n+'\') does work.

Thanks alot :thumbsup: