<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
<html><head><meta http-equiv="content-type" content="text/html";charset="gbk"/><script type="text/javascript" > var str="beijing is not a big city"; var index=str.search(/jing/i); alert(index); 3 var index=str.replace(/jing/i,"hai"); alert(index); beihai is not a big city var str="1+3=4"; var t = str.match(/\d+/g); alert(t); 1,3,4 alert("1,2,3".split(",")); 1,2,3 alert("1,2,3".split(/,/)); 1,2,3 </script></head><body> </body></html>