一:循環語句
1:while循環語句
<script type="text/javaScript"> var a = 0; while (a<10){ a++; document.getElementById("a is" + a +"
"); } </script>
2: do…while循環
do{
a++; document.writeln("a is" + a + " ") } while(a<10)
3:for 循環語句
for (var a= 0; a<10; a++){ document.writeln("hello world!"); }