Check Box control on SharePoint form

How to check value of checkbox control on SP form:

var EligibleValue=$("#ctl00_m_g_baacd937_c4ae_4d2d_9436_57c6bbb65904_ff191_ctl00_ctl00_BooleanField").is(":checked");

alert(EligibleValue);

How to set uncheck value of checkbox control on SP form:

   

$("#ctl00_m_g_baacd937_c4ae_4d2d_9436_57c6bbb65904_ff191_ctl00_ctl00_BooleanField").attr('checked', false);

How to set check value of checkbox control on SP form:

   

$("#ctl00_m_g_baacd937_c4ae_4d2d_9436_57c6bbb65904_ff191_ctl00_ctl00_BooleanField").attr('checked', true);