Jquery batch set properties readonly and disabled methods

Jquery's API provides methods for applying the disabled and readonly attributes to elements, which are documented here. As follows:
1. The readonly

 
　　$('input').attr("readonly","readonly")//Set the input element to readonly
　　$('input').removeAttr("readonly");//Remove the readonly attribute from the input element

　　 if($('input').attr("readonly")==true)//Determines whether the readonly attribute has been set on the input element

　　  For setting for the element readonly Properties and cancellations readonly There are two other methods for attributes:  
　　$('input').attr("readonly",true)//Set the input element to readonly
　　$('input').attr("readonly",false)//Remove the readonly attribute from the input element

　　$('input').attr("readonly","readonly")//Set the input element to readonly
　　$('input').attr("readonly","")//Remove the readonly attribute from the input element

2. The disabled

 
　　 $('input').attr("disabled","disabled")//Set the input element to disabled
　　$('input').removeAttr("disabled");//Removes the disabled attribute from the input element

　　if($('input').attr("disabled")==true)//Determines whether the input element has the disabled property set

There are two other ways to set and remove the disabled property for an element:

 
　　$('input').attr("disabled",true)//Set the input element to disabled
　　$('input').attr("disabled",false)//Removes the disabled attribute from the input element

 
　　$('input').attr("disabled","disabled")//Set the input element to disabled
　　$('input').attr("disabled","")//Removes the disabled attribute from the input element