Javascript help

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HK-47
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Javascript help

Post by HK-47 » Mon Jan 30, 2006 6:30 pm

I know this isnt a programming forum, but its all i got. I have a question about how to do something in javascript.
Lets say I have a thing that looks like this: (roughly)

Code: Select all

<script>
function checkvalue (x, y) {
	cellh = 'document.row' + y + '.col' + x + 'h.value'
	alert(cellh);
}
</script>

<form name="row1"><input name="col1"><input name="col1"></form>

<form name="checkvalueform">
	X: <input type="text" name="x"> Y: <input type="text" name="y">
	<input type="button" value="check value" onclick="checkvalue(document.checkvalueform.x.value, document.checkvalueform.y.value)">
</form>
Now when I go to use the checkvalue function it gives me, for example, "document.row1.col1h.value" rather then the value of document.row1.col1h . Now, is there any way I can do this the way I am? Or should I rewrite the entire concept?

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marshallh
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Re: Javascript help

Post by marshallh » Mon Jan 30, 2006 6:36 pm

HK-47 wrote:

Code: Select all

	cellh = 'document.row' + y + '.col' + x + 'h.value'
	
Am I missing something, or can you just change that last bit to 'h'? I'd go to an online order form and see what code they have to handle invalid entries.
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HK-47
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Post by HK-47 » Mon Jan 30, 2006 6:43 pm

No, its all one big string.
I want to know how to convert the string to a what the string represents. (the value of document.row1.col1h rather then the string "document.row1.col1h.value")

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gannon
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Post by gannon » Mon Jan 30, 2006 8:20 pm

I don't have much experience with variable variables in java. I'll look around though
Edit:
Fixed

Code: Select all

<script type="text/javascript">
function checkvalue () {
var x = document.checkvalueform.x.value;
var y = document.checkvalueform.y.value;
   alert(eval("document.row" + y + ".col" + x + ".value"));
}
</script>
<form name="row1"><input name="col1"></form>
<form name="checkvalueform">
X: <input type="text" name="x">
Y: <input type="text" name="y">
<input type="button" value="check value" onclick="checkvalue()">
</form>
Just remember to evaluate the code inside the alert.
Last edited by gannon on Mon Jan 30, 2006 8:33 pm, edited 1 time in total.

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HK-47
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Post by HK-47 » Mon Jan 30, 2006 8:22 pm

Its ok, Ive rewritten some of it. Its working now. Thanks for offering though. :)

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