Add an common change event handler to all 7 checkboxes, check if any of the checkboxes are checked
<input id="Checkbox2" type="checkbox" value="Accepted" style=" color: Black" class="chkdisplay" onchange="toggleAllCb(this)" /><span style=" color: Black" >Accepted </span><br />
<input id="Checkbox3" type="checkbox" value="Contracted" style=" color: Black" class="chkdisplay" onchange="toggleAllCb(this)"/><span style=" color: Black" >Contracted</span><br />
<input id="Checkbox4" type="checkbox" value="Pending" style=" color: Black" class="chkdisplay" onchange="toggleAllCb(this)"/><span style=" color: Black" >Pending</span><br />
<input id="Checkbox5" type="checkbox" value="Pre-Authorized" style=" color: Black" class="chkdisplay" onchange="toggleAllCb(this)"/><span style=" color: Black" >Pre-Authorized</span><br />
<input id="Checkbox6" type="checkbox" value="Show Deleted" style=" color: Black" class="chkdisplay" onchange="toggleAllCb(this)"/><span style=" color: Black" >Show Deleted</span><br />
<input id="Checkbox7" type="checkbox" value="Treated" style=" color: Black" class="chkdisplay" onchange="toggleAllCb(this)"/><span style=" color: Black" >Treated</span><br />
And in your script
function toggleAllCb(sender)
{
if($("#Alloption").checked) {
if(sender.checked)
$("#Alloption").checked = false;
}
}