function isIP(strIP) { if (strIP=="") return false; var re=/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/g //匹配IP地址的正 则表达式 if(re.test(strIP)) { if( RegExp.$1 function RegExpTest(){ var src = " "; var re = / ]*)>/g; var arr,msg=""; while ((arr = re.exec(src)) != null) msg+=arr[1] +"\r\n"; alert(msg); } RegExpTest(); var s; var re = new RegExp("d(b+)(d)","ig"); var str = "cdbBdbsbdbdz"; var arr = re.exec(str); s = "$1 contains: " + RegExp.$1 + "\n"; s += "$2 contains: " + RegExp.$2 + "\n"; s += "$3 contains: " + RegExp.$3; alert (s); var r, re; // 声明变量。 var s = "The rain in Spain falls mainly in the spain"; re = new RegExp("Spain","ig"); // 创建正 则表达式对象。 r = s.match(re); alert (r); var re = new RegExp("(第一个).*(第二个)","gi"); str=" " var arr = re.exec(str); alert (RegExp.$1) alert (RegExp.$2) [Ctrl+A 全选 注: 如需引入外部Js需刷新才能执行 ]
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