JavaScript typing effect text effects_text effects

The code in this section mainly uses the onMousedown event and the event.button attribute. The main functions and usage are as follows.
　• The setTimeout method, when executed, executes the expression once and only once after delaying the specified time after loading.
　• The charAt method returns a character value that is located at the specified index position. The first character in the string has index 0, the second has index 1, and so on. Index values ​​outside the valid range return an empty string.

<title>Text effects for typing effect</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <center> <h1> </h1>Text effects for typing effect<hr> <div class="ttll" id="tt10"> </div> </center>