Jquery-Question Answering: jquery and conflict

Jquery-Question Answering: jquery and conflict
1. var v = $ ('. summer-input: input'). val (); // obtain the input according to the class

2. var v = $ ('input [name = user \. name] '). val (); // escape name escape \\

3. var v = $ ('input: eq (-2) '). val (); // obtain the penultimate input element in the div and write a negative number.

4. The object [] $ ('div> span'hangzhou.html () is one // div> span, which is the child element of the div. The div span is all

5. if ($ ('# content '). length> 0) {$ ('# content '). remove ();} // determines whether an element exists. $ (). length> 0

6.1,
Function selectCheckbox (){
$ ('# Table thead input [type = checkbox]'). click (function () {// checkbox click Event
If ($ (this). is (": checked ")){
$ ('# Table tbody input [type = checkbox]'). prop ('checked', true); // checkbox determines whether to select, $ (). prop ('checked') = true? False/$ (). is (': checked')/$ (': checked'). length
$ ('# Table tbody tr'). attr ('bgcolor', 'red ');
} Else {
$ ('# Table tbody input [type = checkbox]'). prop ('checked', false );
$ ('# Table tbody tr'). attr ('bgcolor',' # fff ');
}
});
}

6.2/6.3,
Function addClass (){
$ ('# Table tbody input [type = checkbox]'). click (function (){
If ($ (this). prop ('checked ')){
$ (This ). parent ("td "). parent ("tr "). attr ('bgcolor', 'red'); // search for tr: $ (). parent ('td '). parent ('tr ')
} Else {
$ (This). parent ("td"). parent ("tr"). attr ('bgcolor', 'white ');
}
If ($ ('# table tbody tr'). length =$ (' # table tbody input [type = checkbox]: checked'). length ){
$ ('# Table thead input [type = checkbox]'). prop ('checked', true );
} Else {
$ ('# Table thead input [type = checkbox]'). prop ('checked', false );
}
});
}

7.1,
Function ajaxqq (){
$. Ajax ({
Type: 'post ',
Url: 'a.html ',
Data :{
Username: 'King' // parameters {}
}
});
}

7.2/7.3,
Function jxJsonData (){
Var jsonData = {"userList": [{"id": "1", "name": "Player", "age": "18" },{ "id ": "2", "name": "Player 2", "age": "18" },{ "id": "3", "name": "Player 3 ", "age": "18"}], "pageInfo": ["aa", "bb", "cc"]};
Var htmls = "<table> ";
$. Each (jsonData. userList, function (index, value) {// Iteration
Htmls = htmls + "<tr> <td>" + value. id + "</td> <td>" + value. name + "</td> <td>" + value. age + "</td> </tr> ";
});
Htmls = htmls + "</table> ";
$ (Htmls). appendTo ("body ");

Var pages = "";
$. Each (jsonData. pageInfo, function (index, value ){
Pages = pages + index + ":" + value + ",";
});
$ ("<P>" + pages + "</p>"). appendTo ("body ");
}

8.1,
Function ssUL (){
$ ("Ul> li> a"). next ("ul"). hide ();
$ ("Ul> li> a"). click (function (){
$ (This). next ("ul"). toggle (); // hide or display the toggle Function
});
}

8.2,
Function openWindow (){
$ ("<Iframe id = 'iframename' name = 'iframename' style = 'width: 160; height: 160; '> </iframe> "). appendTo ("body ");
$ ('Ul li A'). on ('click', function (){
$ (This ). attr ('target', 'iframename'); // The hyperlink content is opened in iframe. 1. Add the target attribute to the hyperlink. The value is the name of iframe. 2. Add the src value to iframe.
$ ('# Iframename'). attr ('src', $ (this). attr ('href '));
});
}