Copy Code code as follows:
Checked to verify there is a selected return True, no return false
function MyCheckBox () {
var falg = 0;
$ ("Input[name= ' soft[] ']:checkbox"). each (function () {
if ($ (this). attr ("checked")) {
Falg + 1;
}
})
if (Falg > 0)
return true;
Else
return false;
}
This is a relatively good way to collect.
The following function is a supplement to the above:
Copy Code code as follows:
This is how it was written. Jq1.42 's writing.
Secondly, it is recommended that you handle the logic
function MyCheckBox () {
var falg = 0;
$ ("Input[name= ' soft[] ']:checkbox"). each (function () {
if ($ (this). attr ("checked")) {
Falg = 1;
return false;
}
})
if (Falg > 0)
return true;
Else
return false;
}
Here's a simple judgment.
The decision Statement of jquery core judgment statement
if ($ (' Input:checkbox '). attr ("checked") ==true)
Everyone knows in HTML if a check box is selected to be checked= "checked".
But if we use jquery alert ($ ("#id"). attr ("Checked"), you will be prompted to be true instead of checked
So many friends judge if ($ ("#id"). attr ("checked") = = "true") This is wrong, in fact, it should be if ($ ("#id"). attr ("checked") ==true)
Examples include a few features.
<input type= "button" id= "BTN1" value= "Select All" >
<input type= "button" id= "Btn2" value= "deselect All" >
<input type= "button" id= "Btn3" value= "Select All Odd" >
<input type= "button" id= "Btn4" value= "anti-selection" >
<input type= "button" id= "Btn5" value= "Get All values selected" >
Code
Copy Code code as follows:
<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en" >
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<script language= "JavaScript" src= "Http://www.cnjquery.com/demo/jquery.js" ></script >
<script language= "JavaScript" >
<!--
$ ("document"). Ready (function () {
$ ("#btn1"). Click (function () {
$ ("[name= ' checkbox ']"). attr ("Checked", ' true ');/select All
})
$ ("#btn2"). Click (function () {
$ ("[name= ' checkbox ']"). Removeattr ("checked");/Cancel All selection
})
$ ("#btn3"). Click (function () {
$ ("[name= ' checkbox ']:even"). attr ("Checked", ' true ');//Select All odd numbers
})
$ ("#btn4"). Click (function () {
$ ("[name= ' checkbox ']"). each (function () {
if ($ (this). attr ("checked"))
{
$ (this). Removeattr ("checked");
}
Else
{
$ (this). attr ("Checked", ' true ');
}
})
})
$ ("#btn5"). Click (function () {
var str= "";
$ ("[name= ' checkbox '][checked]"). each (function () {
str+=$ (This). Val () + "" R "N";
Alert ($ (this). Val ());
})
alert (str);
})
})
-->
</SCRIPT>
</HEAD>
<BODY>
<form name= "Form1" method= "Post" action= "" >
<input type= "button" id= "BTN1" value= "Select All" >
<input type= "button" id= "Btn2" value= "deselect All" >
<input type= "button" id= "Btn3" value= "Select All Odd" >
<input type= "button" id= "Btn4" value= "anti-selection" >
<input type= "button" id= "Btn5" value= "Get All values selected" >
<br>
<input type= "checkbox" name= "checkbox" value= "CheckBox1" >
CheckBox1
<input type= "checkbox" name= "checkbox" value= "CheckBox2" >
CheckBox2
<input type= "checkbox" name= "checkbox" value= "Checkbox3" >
Checkbox3
<input type= "checkbox" name= "checkbox" value= "Checkbox4" >
Checkbox4
<input type= "checkbox" name= "checkbox" value= "CHECKBOX5" >
Checkbox5
<input type= "checkbox" name= "checkbox" value= "checkbox6" >
Checkbox6
<input type= "checkbox" name= "checkbox" value= "CHECKBOX7" >
checkbox7
<input type= "checkbox" name= "checkbox" value= "Checkbox8" >
Checkbox8
</form>
Copy Code code as follows:
/************ single checkbox full selection ************************/
function Clickcheckbox () {
if ($ ("#checkPathAll"). attr ("checked"))
{
$ ("Input[name= ' Checkpath ']"). each ( {
$ (this). attr ("Checked", true);
});
}
Else
{
$ ("Input[name= ' Checkpath ')"). each (function () {
$ (this). attr ("checked", false);
});
}
}
