Introduction to the differences between HTML name, id, class (format/application scenario/features), etc.

<input type="radio" name='sex'/>Male
<input type="radio" name='sex'/>Female③Quickly obtain a group of tags with the same name: obtain tags with the same name and perform operations together, such as: changing attributes, registering events, etc.;
[code]
function changtxtcolor() {
var txts = document.getElementsByName('txtcolor'); //Get all tags with name=txtcolor
for (var i = 0; i < txts.length; i++) { //Loop through the tags and change the background color to red
txts[i].style.backgroundColor = 'red';
}
}