JavaScript Forum

**tagger** · 11-02-2005, 05:21 PM

Hello,

I'm having what I believe is a syntax error issue with a script I wrote:

Code:

function changeTitle(f) {
for (var i = 0; i < document.form_59_155.elements['property_'+f+].length; i++) 
{document.form_59_155.['property_'+f+][i].checked = false;}
}

I'm not sure the correct way to go about writing this function, can anyone help me?

Thanks in advance for the help!

**funkdaddu** · 11-02-2005, 05:55 PM

You need something after "+f+" or just make it "+f" and "['property_'+f+][i]" isn't valid - too many brackets, what are you trying to do, so I can get a better idea...

**tagger** · 11-02-2005, 06:44 PM

it sorts through a list of radio buttons and unchecks them. However, to be more effecient I would like to use it in a function, since I have several different groups of radio buttons on one page.

For instance if I was going to uncheck one group of radio buttons I would do:

Code:

function changeTitle() {
for (var i = 0; i < document.form_59_155.property_80.length; i++) 
{document.form_59_155.property_80[i].checked = false;}
}

I would like to write a function for this. So basically where you see the number 80, I would like to have the abilitily to change this by calling a function. Hope this makes sense. Thanks for taking a look...

**funkdaddu** · 10:41 PM

This should be what you're looking for, you can use eval() to turn strings into javascript statements:

Code:

<html>
<head>
<script><!--
function resetRadio(radioName) {
	for (i = 0; i <= eval("document.form_59_155." + radioName + ".length")-1; i++) {
		eval("document.form_59_155." + radioName + "[" + i + "].checked = false");
	}
}
--></script>
</head>
<body>
<form name="form_59_155" onsubmit="changeTitle();">
<input type="button" value="Uncheck Alpha group" onclick="resetRadio('alpha');">
<input type="radio" name="alpha" value="blahe">
<input type="radio" name="alpha" value="asldkjas">
<input type="radio" name="alpha" value="askdjv">
<br>
<br>

<input type="button" value="Uncheck Beta group" onclick="resetRadio('beta');">
<input type="radio" name="beta" value="asdasfff">
<input type="radio" name="beta" value="qweqwe">
<input type="radio" name="beta" value="hgdfh">
<input type="radio" name="beta" value="uiopuip">
<input type="radio" name="beta" value="vsdfsf">
</form>

</body>
</html>

**tagger** · 11-03-2005, 12:45 PM

whew! Thanks a mil!