jquery Getting started the next day &&& regular expression completion--making of imitation smarty engine

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Monday completely not in the state ... Noon also to the spectator, did not sleep me, the night smarty do not know can finish, refueling bar

1. JQuery

---filter selector (ii)---

--[attribute=value] Property Selector

property as an important feature of a DOM element or in a selector, the selector for getting elements through element properties is introduced from this section, and [attribute=value] the function of the property selector is to get all the elements that are exactly the same as the property name and property value, where [] is a brace character that is dedicated to the property selector. The parameter attribute represents the property name, and the value parameter represents the property values.

<ul>
<li title= "Vegetables" > Eggplant </li>
<li title= "Fruit" > Banana </li>
<li title= "Vegetables" > Celery </li>
<li title= "Fruit" > Apple </li>
<li title= "Fruit" > Watermelon </li>
</ul>

<script type= "Text/javascript" >
$ ("li[title= ' vegetables ')"). CSS ("Background-color", "green");

[attribute=value]In contrast to the property selector, [attribute!=value] the function of the property selector is to get all elements that do not contain a property name, or that are not the same as the property name and property value, where [] is a brace character that is dedicated to the property selector, the parameter attribute represents the property name, and the value parameter represents the property value.

--[attribute*=value] Property Selector

Describes a more powerful property selector [attribute*=value] that can get all the elements in the property value that contain the specified content, where [] is a brace character that is dedicated to the property selector, the parameter attribute represents the property name, and the value parameter represents the corresponding property value.

<ul>
<li title= "Vegetables" > Eggplant </li>
<li title= "Fruit" > Banana </li>
<li title= "Vegetables" > Celery </li>
<li title= "Ginseng Fruit" > Small tomato </li>
<li title= "Fruit" > Watermelon </li>
</ul>

<script type= "Text/javascript" >

$ ("li[title*= ' fruit ')"). CSS ("Background-color", "green");

--: First-child Sub-element filter Selector

Learning from the above chapters, we know that using :first a filter selector can get the first child element in the specified parent element, but the selector returns only one element, not a collection, and the :first-child child element filter selector allows you to get the first child element returned in each parent element, which is a collection, The selection process of multiple collection data is often used.

<ol>
<li> Celery </li>
<li> Eggplant </li>
<li> Radish </li>
<li> Chinese cabbage </li>
<li> Tomatoes </li>
</ol>
<ol>
<li> oranges </li>
<li> Banana </li>
<li> Grapes </li>
<li> Apple </li>
<li> Watermelon </li>
</ol>

<script type= "Text/javascript" >
$ ("Li:first-child"). CSS ("Background-color", "green");

$ ("Li:last-child"). CSS ("Background-color", "Blue");

In :first-child contrast to the child element filter Selector feature, :last-child the function of a child element filter selector is to get the last child element returned in each parent element, which is also a collection that is often selected for multiple collection data.

---the form selector---

--:input form Selector

How do I get all the elements of my form? :inputthe form selector can be implemented, and its function is to return all of the table cells , including not only all <input> tagged form elements, but also <textarea>, <select>, and < Button> the form element that is marked, so that it chooses the most extensive form element.

<form id= "Frmtest" action= "#" >
<input type= "button" value= "input button"/><br/>
<select>
<option>Option</option>
</select><br/>
<textarea rows= "3" cols= "8" ></textarea><br/>
<button>
Button</button><br/>
</form>

<script type= "Text/javascript" >
$ ("#frmTest: Input"). AddClass ("Bg_blue");
</script>

--:text Form Text Selector

:textThe form text selector can get all the lines of text input box elements in the form, and a single line of text input boxes is like a non-wrapping note tool that is widely used.

<form id= "Frmtest" action= "#" >
<input type= "text" id= "Text1" value= "I'm a little note"/><br/>
<textarea rows= "3" cols= "8" ></textarea><br/>
<input type= "text" id= "Text2" value= "I'm also a little note"/><br/>
<button>
Button</button><br/>
</form>

<script type= "Text/javascript" >
$ ("#frmTest: Text"). AddClass ("Bg_blue");
</script>

--:p assword form password Selector

If you want to get the password input text box, you can use the :password selector, which is the function of getting all the password input text box elements in the form.

<form id= "Frmtest" action= "#" >
<input type= "text" id= "Text1" value= "single line text input box"/><br/>
<input type= "Password" id= "Text2" value= "Password text input box"/><br/>
<textarea rows= "3" cols= "8" > Area text input box </textarea><br/>
<input type= "Password" id= "Text3" value= "Password text input box"/><br/>
<button>
Button</button><br/>
</form>

<script type= "Text/javascript" >
$ ("#frmTest:p assword"). AddClass ("bg_red");
</script>
</body>

--:radio radio Button Selector

Radio buttons in a form are often used for only one selection in multiple data, and :radio a selector makes it easy to get all the radio button elements in a form.

<form id= "Frmtest" action= "#" >
<input type= "button" value= "input button"/><br/>
<input id= "Radio1" type= "Radio"/>
<label for= "Radio1" >
Male </label>
<input id= "Radio2" type= "Radio"/>
<label for= "Radio2" >
Female </label><br/>
<button>
Button</button><br/>
</form>

<script type= "Text/javascript" >
$ ("#frmTest: Radio"). attr ("Disabled", "true");
</script>

--:checkbox check box Selector

The checkboxes in the form are often used for the selection of multiple data, and :checkbox you can use selectors to quickly locate and get the check box elements in the form.

<form id= "Frmtest" action= "#" >
<input type= "button" value= "input button"/><br/>
<input id= "Checkbox1" type= "checkbox"/>
<label for= "Checkbox1" >
Tomato </label><br/>
<input id= "Checkbox2" type= "checkbox"/>
<label for= "Checkbox2" >
Eggplant </label><br/>
<input id= "Checkbox3" type= "checkbox"/>
<label for= "Checkbox3" >
Cucumber </label><br/>
<button>
Button</button><br/>
</form>

<script type= "Text/javascript" >
$ ("#frmTest: CheckBox"). attr ("Disabled", "true");
</script>

--:submit Submit Button Selector

Typically, only one submit button with a "type" attribute value of "submit" is allowed in a form, and :submit the selector can be used to get the submit button element in the form.

<form id= "Frmtest" action= "#" >
<input type= "button" value= "input button"/><br/>
<input type= "Submit" value= "point I submitted"/><br/>
<button>
Button</button><br/>
</form>

<script type= "Text/javascript" >
$ ("#frmTest input:submit"). AddClass ("bg_red");
</script>

--:image Image Domain Selector

When a <input> element's "type" property value is set to "image", the element is an image field, and the :image selector can be used to quickly get all the elements of that class.

<form id= "Frmtest" action= "#" >
<input type= "image" Src= "http://img.mukewang.com/52b284ea00016b2902590070.jpg"/><br/>
<br/>
<br/>
</form>

<script type= "Text/javascript" >
$ ("#frmTest: Image"). AddClass ("bg_red");
</script>

--:button Form Button Selector

There are many types of buttons in the form, and you :button can use selectors to get and get only the common button elements of <input> and <button> of the "type" property with the Value "button".

<form id= "Frmtest" action= "#" >
<input id= "Button1" type= "button" value= "I am the normal button"/><br/>
<input id= "Submit1" type= "Submit" value= "point I will submit"/><br/>
<button> I am also the normal button </button><br/>
</form>

<script type= "Text/javascript" >
$ ("#frmTest: Button"). AddClass ("Bg_blue");
</script>

--:checked Selected State Selector

Some elements are selected, such as check boxes, radio button elements, and when selected, the value of the Checked property is "checked", called: checked can get all the elements that are in the selected state.

<form id= "Frmtest" action= "#" >
<input id= "Radio1" type= "Radio" checked= "checked"/>
<label id= "Label1" for= "Radio1" >
Apple </label><br/>
<input id= "Radio2" type= "Radio"/>
<label id= "Label2" for= "Radio2" >
Orange </label><br/>
<input id= "Checkbox1" type= "checkbox" checked= "Checked"/>
<label id= "Label3" for= "Checkbox1" >
Litchi </label><br/>
<input id= "Checkbox2" type= "checkbox"/>
<label id= "Label4" for= "Checkbox2" >
Grape </label><br/>
<input id= "Checkbox3" type= "checkbox" checked= "Checked"/>
<label id= "Label5" for= "Checkbox3" >
Banana </label><br/>
</form>

<script type= "Text/javascript" >
$ ("#frmTest: Checked"). attr ("Disabled", true);
</script>

--:selected Selected State Selector

The :checked :selected selector can only get the <option> option element in the <select> drop-down list box when compared to the selector.

<form id= "Frmtest" action= "#" >
<select id= "Select1" multiple= "multiple" >
<option value= "0" > Apple </option>
<option value= "1" selected= "selected" > Oranges </option>
<option value= "2" > Lychee </option>
<option value= "3" selected= "selected" > Grapes </option>
<option value= "4" > Banana </option>
</select><br/><br/>
<div id= "Tip" ></div>
</form>

<script type= "Text/javascript" >
var $txtOpt = $ ("#frmTest: Selected"). Text ();
$ ("#tip"). HTML ("selection:" + $txtOpt);
</script>

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2. Regular expressions

jquery Getting started the next day &&& regular expression completion--making of imitation smarty engine