jquery-Problem Solving

1, var v = $ ('. Summer-input:input '). Val (); Get input by class

2, var v = $ (' input[name=user\\.name] '). Val (); Escape band. The name escape \ \

3, var v = $ (' Input:eq ( -2) '). Val (); Gets the countdown to the second INPUT element in the div to write a negative number

4. Object [] $ (' div > Span '). The HTML () is the one//div >span for the sub-element under the Div; Div span is the div in all the

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); The checkbox determines whether the check is selected, $ (). 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 up TR: $ (). Parent (' TD '). Parent (' TR ')
}else{
$ (this). The 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 '//Connect parameter {}
}
});
}

7.2/7.3,
function Jxjsondata () {
var jsondata = {"UserList": [{"id": "1", "name": "Player", "Age": "},{", "id": "2", "Name": "Player 2", "Age": "},{", "id": "3", "name" : "Player 3", "Age": "+"}], "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 (); The toggle function hides or displays
});
}

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 '); Content of hyperlinks Open in IFrame 1, add the target property to the hyperlink, value the name 2 of the IFRAME, add src value to the IFRAME
$ (' #iframename '). attr (' src ', $ (this). attr (' href '));
});
}

jquery-Problem Solving