checked

问题 Looked at the HTML spec, but couldn't make heads or tails of it: http://www.w3.org/TR/html5/the-input-element.html#attr-input-checked What is the correct way to check a checkbox in HTML (not dynamically)? checked="true" checked="checked" What is the correct way to uncheck a checkbox? <input type="checkbox" /> with no checked attribute checked="false" checked="none" Where to check the HTML specification to check/uncheck a checkbox? 回答1: <input type="checkbox" checked="checked" /> or simply

问题 I would like to make a structure with the condition (if-else) RadioButton I want that when the Radiobutton RB1 is selected, this function is active: regAuxiliar = ultimoRegistro; And when the radiobutton RB2 is selected, this function is active: regAuxiliar = objRegistro; And sorry for my English, I'm Brazilian. 回答1: Just as you would with a CheckBox RadioButton rb; rb = (RadioButton) findViewById(R.id.rb); rb.isChecked(); 回答2: if(jRadioButton1.isSelected()){ jTextField1.setText("Welcome"); }

问题 How do I check in PHP whether a checkbox is checked or not? 回答1: If the checkbox is checked, then the checkbox's value will be passed. Otherwise, the field is not passed in the HTTP post. if (isset($_POST['mycheckbox'])) { echo "checked!"; } 回答2: you can check that by either isset() or empty() (its check explicit isset) weather check box is checked or not for example <input type='checkbox' name='Mary' value='2' id='checkbox' /> here you can check by if (isset($_POST['Mary'])) { echo "checked!

问题 I have learned from various tutorial that "If a client can reasonably be expected to recover from an exception, make it a checked exception. If a client cannot do anything to recover from the exception, make it an unchecked exception." I really want to see the effectiveness of previous statement through some code examples. e.g. try { br.readLine(); } catch (IOException e) { e.printStackTrace(); } Here, IOException is checked Exception.So, how I'm supposed to recover when this Exception occurs

问题 I want to verify if my checkbox is checked in php and if it is, i want to echo "Hello word". Here is my html code : <form class="checkclass"> <input type="checkbox" name="checkbox1"> 4K </input> </form> php : <?php if (isset($_POST['checkbox1'])) { echo "Hello world!"; } ?> But it doesn't work and i really don't know how to fix this. Can someone please help me ? 回答1: isset($_GET['checkbox1'])) does not work because it is checking a URL query string. NOT a form submission. Use $_POST instead

问题 help me please! I am novice. I have 3 components of . If the first selectBooleanCheckbox checked then the second and third components should be disabled. And if the first selectBooleanCheckbox unchecked then the second and third components should be active. <h:selectBooleanCheckbox id="checkBox_1" value="#{MyManagerBean.goldRun}" valueChangeListener="#{MyManagerBean.valueChangeInput}"/> <h:selectBooleanCheckbox id="checkBox_2" value="#{MymanagerBean.useResult}" /> <h:selectBooleanCheckbox id=

问题 http://jsfiddle.net/anvhw/1/ I'm having some trouble trying to change a property on the <a> tag when the first radio button is checked. It works fine when I want to change a <label> property when one is checked but not with the <a> Can anyone help me out? 回答1: The + selector means there must not be any other elements coming between the two elements. The reason + label works is because your label comes immediately after your radio button. However, that label is standing between your radio

问题 I have three checkboxes. Each checkbox has a 'name' and 'age' text box next to them. 'Singles' checkbox box has one set of these textboxes while 'Couples' checkbox has two sets. I'm looking for code which will provide an 'alert' message prior to submitting a form to say all textboxes must be filled in if corresponding checkbox is ticked. For instance, if only 'Singles' checkbox is ticked, only 'Singles' Textboxes to be checked. If 'Singles' and 'Couples' Checked, Textboxes for 'Singles' and

问题 I'm trying to find out how many checkboxes have been checked but am having some trouble.. My checkboxes are all named delete[] . var count = ($('#form_store_setup input[name=delete]:checked').length); ...and this doesn't work at all: var count = ($('#form_store_setup input[name=delete[]]:checked').length); 回答1: Simply wrap delete[] in double quotes in your second example like this: var count = ($('#form_store_setup input[name="delete[]"]:checked').length); 回答2: You need to escape the square

问题 I've populated a QListWidget with a list of items and added a check box leaving everything unchecked. for td in root.iter('testdata'): test_data = td.get('ins') item = QtGui.QListWidgetItem(test_data, self.listWidgetLabels) item.setFlags(item.flags() | QtCore.Qt.ItemIsUserCheckable) item.setCheckState(QtCore.Qt.Unchecked) The user then clicks a few of the items in the QListItem and clicks a 'Generate File' button on the gui. self.pushButtonGenerateFile.clicked.connect(self.generate_file) I