JQuery1.6 usage method 1

Error: function (msg) {// declaration error
Throw msg;
},
ParseJSON: function (data) {// convert a string to json format
If (typeof data! = "String" |! Data) {// first determine whether the string exists
Return null;
}
Data = jQuery. trim (data); // remove the front and back Spaces
If (window. JSON & window. JSON. parse) {// The advanced version has the native JSON Conversion Function window. JSON.
Return window. JSON. parse (data );
}
If (rvalidchars. test (data. replace (rvalidescape ,"@")//
. Replace (rvalidtokens, "]") //
. Replace (rvalidbraces, "") {// a simple test is performed on {true: 1 },{ "" ,{}}......
// Rvalidchars =/^ [\], :{}\ s] * $ /,
// Rvalidescape = /\\(? : ["\\\/Bfnrt] | u [0-9a-fA-F] {4})/g, u [0-9a-fA-F] {4} matches both Chinese and English characters and escape characters
// Rvalidtokens =/"[^" \ n \ r] * "| true | false | null | -? \ D + (? : \. \ D *)? (? : [EE] [+ \-]? \ D + )? /G, // The matching string does not include "\", "\ n", "\ r", Boolean value, null, and number.
// Rvalidbraces = /(? : ^ |: | ,)(? : \ S * \ [) +/g, matching (starting with null or: Or,) (followed by zero or multiple spaces, followed by [) such [,: [, [, [, and so on
Return (new Function ("return" + data ))();
}
JQuery. error ("Invalid JSON:" + data );
},
ParseXML: function (data, xml, tmp) {do not understand the use of passing in xml tmp
If (window. DOMParser) {// Standard
// The DOMParser object parses the XML text and returns an XML Document object. To use DOMParser, use a constructor without parameters to instantiate it, and then call its // parseFromString () method:
Tmp = new DOMParser ();
Xml = tmp. parseFromString (data, "text/xml ");
} Else {// IE
Xml = new ActiveXObject ("Microsoft. XMLDOM ");
Xml. async = "false ";
Xml. loadXML (data );
}
Tmp = xml.doc umentElement;
If (! Tmp |! Tmp. nodeName | tmp. nodeName = "parsererror") {// determines whether the returned result is null, not a node, and whether an error is returned.
JQuery. error ("Invalid XML:" + data );
}
Return xml;
}
GlobalEval: function (data) {// convert data to Executable
If (data & rnotwhite. test (data) {// check whether it exists and whether it is not empty
(Window.exe cScript | function (data ){
Window ["eval"]. call (window, data); // javascscript. Other vagrants use window. eval. call (window, data );
}) (Data );
}
},
NodeName: function (elem, name ){
Return elem. nodeName & elem. nodeName. toUpperCase () = name. toUpperCase (); // determines whether the node is a node. By default, the node name is in uppercase. To ensure correct judgment, it is converted to the same format (in uppercase)
},
Each: function (object, callback, args ){
Var name, I = 0,
Length = object. length, // window, String, Function, Array type is not undefined ;..
IsObj = length = undefined | jQuery. isFunction (object); // mainly used to partition objects and Arrays
If (args) {// if no parameter is input, the default name and value are used as the parameter. if there is a parameter, the passed parameter is used.
If (isObj ){
For (name in object ){
If (callback. apply (object [name], args) === false ){
Break;
}
}
} Else {
For (; I <length ;){
If (callback. apply (object [I ++], args) === false ){
Break;
}
}
}
} Else {// if no parameter is input,
If (isObj ){
For (name in object) {// object [name] value as the current object, the name and value as the parameter
If (callback. call (object [name], name, object [name]) === false) {// judge the return value of the callback function and determine whether to continue the loop.
Break;
}
}
} Else {
For (; I <length;) {// object [I] value as the current object, the name (I is sequential) and value as the parameter
If (callback. call (object [I], I, object [I ++]) === false) {// judge the callback function return value and determine whether to continue the loop.
Break;
}
}
}
}
Return object;
},
Trim: trim? // Check whether there is a native trim method. If the parameter is text! = Blank before and after truncation. Otherwise, null is returned. If no native trim is returned, it is forcibly converted to a string and then replaced with a regular expression. Otherwise, an error is returned, use regular expression replacement (trimLeft =/^ \ s +/, // match left blank, trimRight =/\ s + $/, // match right blank ),
Function (text ){
Return text = null?
"":
Trim. call (text );
}:
Function (text ){
Return text = null?
"":
Text. toString (). replace (trimLeft, ""). replace (trimRight ,"");
},