❮ Input Checkbox Object Example Find out if the checkbox is checked by default: varx = document.getElementById("myCheck").defaultChecked; Try it Yourself » Description The defaultChecked property returns the default value of the checked attribute. ...
defaultChecked 属性可返回 checked 属性的默认值。该属性在 checkbox 默认被选定时返回 true,否则返回 false。语法checkboxObject.defaultChecked 浏览器支持所有主要浏览器都支持 defaultChecked 属性实例实例 下面的例子可返回 checked 属性的值: <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>...
(7)checkbox type="checkbox"是复选框,允许选择或取消选择该选项: <inputtype="checkbox"id="agreement"name="agreement"checked><labelfor="agreement">是否同意</label> 上面代码会在文字前面,显示一个可以点击的选择框,点击可以选中,再次点击可以取消。上面代码中,checked属性表示默认选中。 value属性的默认值是on...
checked --><inputtype="checkbox"name="check"id="GFG"value="1"checked>Checked by default<br><inputtype="checkbox"name="check"value="2">Not checked by default<br></form><br><buttononclick="myGeeks()">Submit</button><pid="sudo"style="color:green;font-size:30px;"></p><!-- script...
"required" --><inputtype="checkbox"name="check"id="GFG"value="1"required>Checked by default<br><inputtype="checkbox"name="check"value="2">Not checked by default<br></form><br><buttononclick="myGeeks()">Submit</button><pid="sudo"style="color:green;font-size:20px;"></p><!-- ...
checkboxObject.checked = true|false Property Values ValueDescription true|falseSpecifies whether a checkbox should be checked or not. true - The checkbox is checked false - Default. The checkbox is not checked Technical Details Return Value:A Boolean, returns true if the checkbox is checked, and...
document.getElementById("check1").checked=false } </script> </head> <body> <form> <input type="checkbox" id="check1">你喜欢夏天吗? </form> <button onclick="check()">确认选择框</button> <button onclick="uncheck()">不确认选择框</button> </body> </html> 尝试一下 » 更多...
it will change the value of checkbox if not checked the value will assign 0 and if checkbox checked then assign value into 1 $("form").submit(function () { var this_master = $(this); this_master.find('input[type="checkbox"]').each( function () { var checkbox_this = $(this);...
If a checkbox has the class 'group-required' at least one of the checkboxes with the same name inside the form/document has to be checked. And here's an example of how you would use it: <input name="checkbox-group" type="checkbox" class="group-required" id="checkbox-group-id"...
</form> < /body> < /html> 代码中 <input type="checkbox name=vehicle" id="checkbox1" value="Car checked=""/>i hava a car 只要出现了checked="",不管等于什么,可以等于checked="checked",甚至checked="false",其checkbox的属性checked都是true,在alert中输出其checked属性都是true. ...