JS Collection Study Notes (Part 2)_Basic Knowledge

56. Focus order in JS: document.getElementByid("Form Element").tabIndex = 1
57.The value of innerHTML is the value of the form element: such as

"how are you"

, then the value of innerHTML is: how are you
58. The value of innerTEXT is the same as above, except that the tag will not be displayed.
59 .contentEditable can set whether the element can be modified, isContentEditable returns the status of whether it can be modified.
60.isDisabled determines whether it is a prohibited state. disabled sets the prohibited state
61.length gets the length and returns an integer value
62.addBehavior() is an external function file called by JS. Its extension is .htc
63.window.focus() puts the current window in front of all windows.
64.blur() means losing focus . Contrary to FOCUS().
65.select() means that the element is selected.
66. Prevent the user from entering text into the text box: onfocus="this.blur()"
67. Remove The number of occurrences of this element in the page: document.all.tags("div (or other HTML tags)").length
68. There are two types of form output in JS: modal and non-modal. window.showModaldialog(), window.showModeless()
69. Status bar text setting: window.status='text', default status bar text setting: window.defaultStatus = 'text.';
70 .Add to favorites: external.AddFavorite("http://www.dannyg.com/");
71. Do nothing when encountering a script error in JS: window.onerror = doNothing; Specify the error handle The syntax is: window.onerror = handleError;
72.JS specifies the parent window of the currently opened window: window.opener, which supports multiple continuations of opener.opener....
73.self in JS refers to is the current window
74. The content displayed in the status bar in JS: window.status="content"
75. The top in JS refers to the topmost frame in the frame set
76. Close in JS Current window: window.close();
77. Confirmation box in JS: if(confirm("Are you sure?")){alert("ok");}else{alert("Not Ok");}
78.Window redirection in JS: window.navigate("http://www.sina.com.cn/");
79.Print in JS: window.print ()
Prompt input box in 80.JS: window.prompt("message","defaultReply");
Window scroll bar in 81.JS: window.scroll(x,y)
82.Scroll the window to the position in JS: window.scrollby
83.Set the time interval in JS: setInterval("expr",msecDelay) or setInterval(funcRef,msecDelay) or setTimeout
84.Module in JS The status is displayed in IE4, but not in NN: showModalDialog("URL"[,arguments][,features]);
85. The handle used before exiting in JS: function verifyClose(){event.returnValue=" we really like you and hope you will stay longer.";}} window.onbeforeunload=verifyClose;
86. The file handle used when the form is called for the first time: onload()
87. When the form File handle called when closing: onunload()
Properties of 88.window.location: protocol(http:),hostname(http://www.example.com),port(80),host(www.example .com:80), pathname (/", refers to jumping to the corresponding anchor), href (all information)
89.window.location.reload() refreshes the current page.
90.window. history.back() returns to the previous page, window.history.forward() returns to the next page, window.history.go (returns to which page, you can also use the visited URL)
91.document.write( ) output without line wrapping, document.writeln() wraps output
92.document.body.noWrap=true; prevents link text from wrapping.
93. Variable name.charAt (number), take the variable The number of characters.
94. "abc".charCodeAt (number of characters), returns the ASCii code value of the character of "abc".
95. String concatenation: string.concat(string2), or Use = to connect
96. Variable .indexOf("Character", starting position), returns the first occurring position (calculated from 0)
97.string.lastIndexOf(searchString[,startIndex]) The position of the last occurrence.
98.string.match(regExpression), determine whether the characters match.
99.string.replace(regExpression,replaceString) replace the existing string.
100.string.split (separator) returns an array storage value.
101.string.substr(start[,length]) takes the string from the number to the specified length.
102.string.toLowerCase() makes the string Change all characters to lowercase.
103.string.toUpperCase() changes all characters to uppercase.
104.parseInt(string[,radix(representing base)]) forces conversion to integer type.
105 .parseFloat(string[,radix]) is forced to convert to a floating point type.
106.isNaN (variable): Test whether it is a numeric type.
107. Keyword for defining constants: const, keyword for defining variables :var