我是 Javascript 的新手,只有在选中 3 个复选框中的任意 2 个时,我才会尝试显示其他信息。
到目前为止,这是我的代码(我正在尝试在问题中输入我的代码,但它不起作用,抱歉。我也可能使它变得更复杂,然后是必要的,再次抱歉)。我确实将我的代码放在了演示中。
<script>
var checkboxes;
window.addEvent('domready', function() {
var i, checkbox, textarea, div, textbox;
checkboxes = {};
// link the checkboxes and textarea ids here
checkboxes['checkbox_1'] = 'textarea_1';
checkboxes['checkbox_2'] = 'textarea_2';
checkboxes['checkbox_3'] = 'textarea_3';
for ( i in checkboxes ) {
checkbox = $(i);
textbox = $(checkboxes[i]);
div = $(textbox.id + '_container_div');
div.dissolve();
showHide(i);
addEventToCheckbox(checkbox);
}
function addEventToCheckbox(checkbox) {
checkbox.addEvent('click', function(event) {
showHide(event.target.id);
});
}
});
function showHide(id) {
var checkbox, textarea, div;
if(typeof id == 'undefined') {
return;
}
checkbox = $(id);
textarea = checkboxes[id];
div = $(textarea + '_container_div');
textarea = $(textarea);
if(checkbox.checked) {
div.setStyle('display', 'block');
//div.reveal();
div.setStyle('display', 'block');
textarea.disabled = false;
} else {
div.setStyle('display', 'none');
//div.dissolve();
textarea.value = '';
textarea.disabled = true;
}
}
<label for="choice-positive">
<script type="text/javascript">
function validate(f){
f = f.elements;
for (var c = 0, i = f.length - 1; i > -1; --i)
if (f[i].name && /^colors\[\d+\]$/.test(f[i].name) && f[i].checked) ++c;
return c <= 1;
};
</script>
<label>
<h4><div style="text-align: left"><font color="black">
<input type="checkbox" name="colors[2]" value="address" id="address">Full Address
<br>
<label>
<input type="checkbox" name="colors[3]" value="phone" id="phone">Phone Number <br>
<label>
<input type="checkbox" name="colors[4]" value="account" id="account">Account Number <br>
</form>
<div class="reveal-if-active">
<h2><p style = "text-decoration:underline;"><font color="green">Receive the 2 following
pieces of info:</h2></p>
</style>