JQUERY checkbox CHECKBOX select all, cancel all selection_jquery

Copy code The code is as follows:

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A simpler one:

Copy code The code is as follows:

$("#checkall"). click(
function(){
if(this.checked){
$("input[name='checkname']").each(function(){this.checked=true;}) ;
}else{
$("input[name='checkname']").each(function(){this.checked=false;});
}
}
);