正则表达式-string 转数组

<script>

var data = "123123,213,12312,312,3,Cat,cat,dsfsdfs";

//var recat=/c(.*?)t/gi;

//alert(recat.exec(data)[1]);  //Cat

 

alert(changeArr(data)[4]);

function changeArr(str)

{

var recat=/\,/;

var arr= str.split(recat);

return arr;

}

</script>