Jquery gets the value of the checkbox selected

2020-03-30 02:28:18
OfStack

 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<mce:style><!-- 

--></mce:style><style mce_bogus="1"> 

</style> 
<title>JS Gets the value of the check box selected </title> 
</head> 
<body> 
<input type="checkbox" name="test" value="0" />0 
<input type="checkbox" name="test" value="1" />1 
<input type="checkbox" name="test" value="2" />2 
<input type="checkbox" name="test" value="3" />3 
<input type="checkbox" name="test" value="4" />4 
<input type="checkbox" name="test" value="5" />5 
<input type="checkbox" name="test" value="6" />6 
<input type="checkbox" name="test" value="7" />7 
<input type="button" onclick="chk()" value=" mention   Hand in " /> 
</body> 
</html

JS code

 
<mce:script src="jquery.js" mce_src="jquery.js"></mce:script><!-- This is loaded jquery.js File if not used jquery Can be removed --> 
<mce:script type="text/javascript"><!-- 

function chk(){ 
var obj=document.getElementsByName('test'); //Select all objects whose name="'test'" and return the array
//Once we get the array of objects, we loop through to see if it's selected
var s=''; 
for(var i=0; i<obj.length; i++){ 
if(obj[i].checked) s+=obj[i].value+','; //If selected, add value to the variable s
} 
//So now that we check the value of s we know what the check box is
alert(s==''?' You haven't chosen anything yet! ':s); 
} 

function jqchk(){ //Jquery gets the check box value
var chk_value =[]; 
$('input[name="test"]:checked').each(function(){ 
chk_value.push($(this).val()); 
}); 
alert(chk_value.length==0 ?' You haven't chosen anything yet! ':chk_value); 
} 
// --></mce:script>

A few other operations on the checkbox

1. The selection
Cancel all selections
3. Select all the odd Numbers
4. Deselect
5. Get all the selected values

Js code

 
$("document").ready(function(){ 
$("#btn1").click(function(){ 
$("[name='checkbox']").attr("checked",'true');// Future generations  
}) 
$("#btn2").click(function(){ 
$("[name='checkbox']").removeAttr("checked");//To cancel all
}) 
$("#btn3").click(function(){ 
$("[name='checkbox']:even").attr("checked",'true');//Select all odd Numbers
}) 
$("#btn4").click(function(){ 
$("[name='checkbox']").each(function(){// The selected  
if($(this).attr("checked")){ 
$(this).removeAttr("checked"); 
} 
else{ 
$(this).attr("checked",'true'); 
} 
}) 
}) 
$("#btn5").click(function(){//Output the selected value
var str=""; 
$("[name='checkbox'][checked]").each(function(){ 
str+=$(this).val()+"/r/n"; 
//alert($(this).val()); 
}) 
alert(str); 
}) 
})

HTML code:

 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>louis-blog >> jQuery  right checkbox The operation of the </title> 
<mce:script type='text/javascript' src="http://leotheme.cn/wp-includes/js/jquery/jquery.js" mce_src="http://leotheme.cn/wp-includes/js/jquery/jquery.js"></mce:script> 
<SCRIPT LANGUAGE="JavaScript"> 
<!-- 
$("document").ready(function(){ 
$("#btn1").click(function(){ 
$("[name='checkbox']").attr("checked",'true');// Future generations  
}) 
$("#btn2").click(function(){ 
$("[name='checkbox']").removeAttr("checked");//To cancel all
}) 
$("#btn3").click(function(){ 
$("[name='checkbox']:even").attr("checked",'true');//Select all odd Numbers
}) 
$("#btn4").click(function(){ 
$("[name='checkbox']").each(function(){// The selected  
if($(this).attr("checked")){ 
$(this).removeAttr("checked"); 
} 
else{ 
$(this).attr("checked",'true'); 
} 
}) 
}) 
$("#btn5").click(function(){//Output the selected value
var str=""; 
$("[name='checkbox'][checked]").each(function(){ 
str+=$(this).val()+"/r/n"; 
//alert($(this).val()); 
}) 
alert(str); 
}) 
}) 
--> 
</SCRIPT> 
</HEAD> 
<body style="text-align:center;margin: 0 auto;font-size: 12px;" mce_style="text-align:center;margin: 0 auto;font-size: 12px;"> 
<div style="border: 1px solid #999; width: 500px; padding: 15px; background: #eee; margin-top: 150px;"> 
<form name="form1" method="post" action=""> 
<input type="button" id="btn1" value=" Future generations "> 
<input type="button" id="btn2" value=" To cancel all "> 
<input type="button" id="btn3" value=" Select all odd Numbers "> 
<input type="button" id="btn4" value=" The selected "> 
<input type="button" id="btn5" value=" Gets all the selected values "> 
<br /><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 
</form> 
</div> 
</body> 
</HTML>