setTimeout()执行时序
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>SETTIMEOUT</title>
<script type="text/javascript">
var len=4;
var t = null;
while(len--){
t = setTimeout("showinfo(len,t)",2000);
document.write(len+" ");
}
document.write("<br/>");
document.write(" abc"+len);
function showinfo(num1,num2)
{
document.write("len:"+num1+" t:"+num2);
}
</script>
</head>
<body>
<div></div>
</body>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>SETTIMEOUT</title>
<script type="text/javascript">
var len=4;
var t = null;
while(len--){
t = setTimeout("showinfo(len,t)",2000);
document.write(len+" ");
}
document.write("<br/>");
document.write(" abc"+len);
function showinfo(num1,num2)
{
document.write("len:"+num1+" t:"+num2);
}
</script>
</head>
<body>
<div></div>
</body>
</html>
网页显示：
首先输出：
3 2 1 0
abc-1
2s后输出：
len:-1 t:10
setTimeout()启动后，与其他字段同时执行。
