## split() 将字符串变为字符串 **stringObject.split(separator,howmany)** ~~~ <script type="text/javascript"> var str="How are you doing today?" document.write(str.split(" ") + "<br />") document.write(str.split("") + "<br />") document.write(str.split(" ",3)) </script> ~~~ 输出： ~~~ How,are,you,doing,today? H,o,w, ,a,r,e, ,y,o,u, ,d,o,i,n,g, ,t,o,d,a,y,? How,are,you ~~~ ## 将字符串转换位数字 parseInt() parseFloat()