Summary of methods for obtaining id values ​​in jquery_jquery

Copy code The code is as follows:

eq(0) takes the first jq element. . .

eq(index)
matches an element with a given index value

Matches a single element by its index.
Return value
Element

Parameter
index (Number): counting from 0

Example
Find the second row

HTML code:

Copy code The code is as follows:

< ;td>Header 1

Value 1

Value 2< /td>

jQuery code:

Copy code The code is as follows:

$("tr:eq(1)")

Result:

Copy code The code is as follows:

[ Value 1< /td> ]

Get values ​​of different ids

Copy code The code is as follows:

aaa,


bbb,


ccc,


ddd,


eee,

This will get all the ids you want:
0_1
0_2
0_3
0_4
0_5

Text box, text area:

Copy code The code is as follows:

$("#txt").attr("value ",'');//Clear content
$("#txt").attr("value",'11');//Fill content

Multiple selection box checkbox:

Copy code The code is as follows:

$("#chk1").attr("checked ",'');//Unchecked
$("#chk2").attr("checked",true);//Checked
if($("#chk1").attr( 'checked')==undefined) //Determine whether it has been checked

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