¡¶JavaScript And DHTML Cookbook¡·Ñ§Ï°±Ê¼Ç

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·×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("Hello!");
    if( aString == "Hello!" ){ }    //½á¹û: true
    if( aString == bString ){ }     //½á¹û: true
    if( aString === bString ){ }    //½á¹û: fa