The HTML DOM Input Password pattern property is used for setting or returning the pattern attribute of an input password field. It checks the password against a regular expression specified by the pattern property.SyntaxFollowing is the syntax forSetting the pattern property −passwordObject.pattern = regexpHere, regexp is a regular expression against which the password field is checked.ExampleLet us look at an example for the password pattern property − Input Password pattern property The password can either be of three numeric characters or 6 alphabet characters from a to g Password: GET PATTERN   ... Read More

The HTML DOM Input Password object is associated with the element with type “password”. We can create and access an input element with type password using the createElement() and getElementById() methods respectively.PropertiesFollowing are the properties for the password object −Sr.NoProperty & Description1autocompleteTo set or return the autocomplete attribute value of a password field2autofocusTo set or return if the password field should automatically get focus when the page loads.3defaultValueTo set or return the password field default value.4disabledTo set or return whether the password field is disabled, or not.5formTo return the reference of the form containing the password field6maxLengthTo set or ... Read More

The HTML DOM input radio required property is associated with the required attribute of an element. The required property is used for setting and returning if it is necessary to check some radio button or not before the form is submitted to the server. This allows the form to not submit if a radio button with required attribute is left unchecked by the user.SyntaxFollowing is the syntax for −Setting the required property.radioObject.required = true|falseHere, true represents the radio button must be checked while false represents its optional to check the radio button before submitting the form.ExampleLet us look at ... Read More

The HTML DOM Input radio object is associated with the element with type “radio”. We can create and access an input element with type radio using the createElement() and getElementById() method respectively.PropertiesFollowing are the properties of the Input Radio object −Sr.NoProperties & Description1AutofocusTo set or return if the radio button should get focus automatically when the page loads or not.2CheckedTo set or return the radio button checked state.3defaultCheckedTo return the checked attribute default value for a radio button4defaultValueTo set or return the radio button default value.5DisabledTo set or return whether the radio button should e disabled, or not6FormTo return ... Read More

The HTML DOM Input radio name property is used for setting or returning the name attribute of an input radio field. The name attribute helps in identifying the form data after it has been submitted to the server. JavaScript can also use the name attribute to refer form elements to manipulate later on.SyntaxFollowing is the syntax for −Setting the name property.radioObject.name = nameHere, name is for specifying the radio button name.ExampleLet us look at an example for the radio name property −Live Demo Input radio name Property FRUIT: Orange Change the name of the above radio ... Read More

The HTML DOM Input Radio form property is used for returning the form reference that contains the given input radio button. If the radio button is outside the form then it will simply return NULL. This property is read-only.SyntaxFollowing is the syntax for input radio form property −radioObject.formExampleLet us look at an example for the Input radio form property. Input radio form Property FRUIT: Mango Get the form id by clicking on the below button GET FORM    function formId() {       var P=document.getElementById("Mango").form.id;       document.getElementById("Sample").innerHTML = "The id of ... Read More

The HTML DOM Input Radio disabled property is used for setting or returning if the radio button should be disabled or not. It uses boolean values with true representing the element should be disabled and false otherwise. The disabled property is set to false by default. The disabled element is greyed out by default and is unclickable .SyntaxFollowing is the syntax to −Set the disabled property.radioObject.disabled = true|false;Here, true= the radio button is disabled and false=the radio button is not disabled. It is false by default.ExampleLet us look at an example for the Input radio disabled property −Live Demo ... Read More

The HTML DOM Input Radio defaultChecked property checks whether the radio button has been checked by default or not. It returns true if the radio button is checked otherwise it will return false.SyntaxFollowing is the syntax for Radio defaultChecked property −radioObject.defaultCheckedExampleLet us look at an example of the Radio defaultChecked property −Live Demo Input Radio defaultChecked property FRUIT: Mango CHECK    function checkDefault() {       var c = document.getElementById("Mango").checked;       document.getElementById("Sample").innerHTML = "The button default checked value is "+c;    } OutputThis will produce the following output ... Read More

The HTML DOM Input Radio checked property is associated with the checked property of an element with type radio. It is used to basically set or return the checked attribute value of the radio button.SyntaxFollowing is the syntax for −Setting the checked property.radioObject.checked = true|falseExampleLet us look at an example for the Radio checked property −Live Demo Input Radio checked property FRUIT: Mango Apple Check Apple    function checkApple() {       document.getElementById("Apple").checked = true;    } OutputThis will produce the following output −On clicking the “Check Apple” button −In the ... Read More

The HTML DOM input radio autofocus property is associated with the HTML element’s autofocus attribute. This property is used for setting or returning whether the input radio button automatically be focused when the page loads or not.SyntaxFollowing is the syntax for −Setting the autofocus property.radioObject.autofocus = true|falseHere, true represents the radio button should get focus and false represents otherwise. It is set to false by default.ExampleLet us look at an example for the Input Radio autofocus property − Input password autofocus property RADIO: CHECK FOCUS    function FocusVal() {     ... Read More