JavaScript³£Óú¯ÊýÒÔ¼°Óï·¨

 .×Ö·û´®(String)
1.ÉùÃ÷
     var myString = new String("Every good boy does fine.");
     var myString = "Every good boy does fine.";
   2.×Ö·û´®Á¬½Ó
     var myString = "Every " + "good boy " + "does fine.";
     var myString = "Every ";   myString += "good boy does fine.";
   3.½ØÈ¡×Ö·û´®
     //½ØÈ¡µÚ 6 λ¿ªÊ¼µÄ×Ö·û
     var myString = "Every good boy does fine.";
     var section = myString.substring(6);     //½á¹û: "good boy does
fine."
   
     //½ØÈ¡µÚ 0 λ¿ªÊ¼ÖÁµÚ 10 λΪֹµÄ×Ö·û
     var myString = "Every good boy does fine.";
     var section = myString.substring(0,10); //½á¹û: "Every good"
   
     //½ØÈ¡´ÓµÚ 11 λµ½µ¹ÊýµÚ 6 λΪֹµÄ×Ö·û
     var myString = "Every good boy does fine.";
     var section = myString.slice(11,-6);     //½á¹û: "boy does"
   
     //´ÓµÚ 6 λ¿ªÊ¼½ØÈ¡³¤¶ÈΪ 4 µÄ×Ö·û
     var myString = "Every good boy does fine.";
     var section = myString.substr(6,4);      //½á¹û: "good"
   4.ת»»´óСд
     var myString = "Hello";
     var lcString = myString.toLowerCase();   //½á¹û: "hello"
     var ucString = myString.toUpperCase();   //½á¹û: "HELLO"
   5.×Ö·û´®±È½Ï
     var aString = "Hello!";
     var bString = new String(&q