Javascript中RegExp

/pattern/attributes      var reg=/^[0-9]*$/gim

 RegExp  reg = new  RegExp(patterns,attributes)   

var str= "cat2,hat8" ;var reg=/c(at)\d/ ;  有分組console.info(reg.exec(str));//運行返回   ["cat2", "at"]

var someText= "web2.0 .net2.0" ;var pattern=/(\w+)(\d)\.(\d)/g;var outCome_exec=pattern.exec(someText); ["web2.0","web","2","0"]var outCome_matc=someText.match(pattern); ["web2.0","net2.0"]

function fn() { for(var i = 0;i < arguments.length;i++){alert("第"+(i+1)+"個參數的值："+arguments[i]);} } var str = '<div id="{wo}" >{ni}</div>'; str.replace(/\{([a-z]+)\}/ig, fn); 

var str= "cat2,hat8" ;var reg=/at/ ;console.info(str.split(reg));["c", "2,h", "8"]console.info(str.split(reg，2));["c", "2,h"]

var str="alert.login.verifyfailed=Your email or password is incorrect!";var reg=/^alert.\w*(.\w*)=((?:\w*[ !\.])*)$/;var out=str.match(reg);console.info($0);