JQuery verifies whether Checkbox is the selected Code Recommendation _ jquery

JQuery verifies whether the Checkbox code is selected. For more information, see. We recommend that you read the articles related to the home of your feet. Most people think of this method for verification estimation:

The Code is as follows:

Function chk () // check whether the selected return true and no return false are selected.
{
Var falg = 0;
$ ("Input [name = cbname]: checkbox"). each (function (){
If ($ (this). attr ("checked") // here you can use if ($ ("# cr"). is (": checked "))
{
Falg + = 1; // you can add return false to exit the loop.
}
})
If (falg> 0)
Return true;
Else
Return false;
}

This method is really good, but I think the following code is simpler and more efficient:
If ($ ("input [name = cbname]: checkbox"). length = 0) // No middle item is selected
Selected as needed