创建string的方法

 

 

var str =abc;
var str = new String(abc);
var str = String(abc');


 

length 属性方法

indexOf replace charAt split

 


<script typt=text/javascript>
var str=abcdefghi;
alert(str);//abcdefghi
alert(str.charAt(0));//a
var str1=aaa;
var str2=bb;
var str3=cc;
alert(str1.concat(str1,str2,str3));//abbcc
alert(str1.indexOf(a,0));
alert(str.replace(a,lll));
var arr = str.split();
for(var i=0;i 

 

substr boUpperCase toLowerCase

var str=abcdefghi;

alert(str.substr(0,2));//ab 
alert(str.substr(1,3));//bcd

alert(str.toUpperCase());//ABCDEFGI
alert(str.toLowerCase());//abcdefgi