jquery get single or group value of checkbox checkbox

Assuming that an existing page has a group of checkboxes whose name value is check, the method to obtain the value of this group of checkboxes with name=check is as follows:

js code  

1. var checkValue=new Array(); 
2. //or var  checkValue=[];
3. $('input[name="check "]:checked').each(function(){  
4.     checkValue .push($( this ).val()); //Add an element to the array  
5. });  
6. var  checkstr= checkValue .join( ',' ); // join array elements to build a string  
7. alert(checkstr);  

 

 

The method of judging whether a single checkbox is selected and getting the selected value is as follows:

js code  

1. if($("#id").is(":checked")){//选中  
2.     alert($( "#id" ).val()); // print the selected value  
3. }