Change checkbox value

[ooiyh]

Is this how you change checkbox value?
If so, it seems that I cant pass my value for SQL processing once I unchecked the checked box.

Javascipt:

function changevalue()
{
	box = eval("document.form1.gopublic");
	if (box.checked == false) 
	{
		alert("disallow");
		document.form1.gopublic[0].value = "disallow";
	}
	else
	{
		alert("allow");
		document.form1.gopublic[0].value = "allow";
	}
}

HTML

<input name="gopublic" type="checkbox" id="gopublic" value="allow" checked="checked"  onclick="changevalue()"/>

[Kor]

un unchecked checkbox is not an active element, thus it's value will not be submit. Use rather a pair of radio buttons, one of them checeked by default.