Disable people picker column in New/Edit Form

The following JQuery script can be used to achieve this. Please note ApproverName is nothing but people picker field name.

 <script type="text/javascript">
$(document).ready(function()
{
$('nobr:contains("ApproverName")').closest("td").next("td").attr("disabled", "disabled");
$("div[id$='_UserField_upLevelDiv']").attr("contentEditable",false);
$("span[id$='_UserField']").find("img").hide();
}
);

function PreSaveAction()
{
$('nobr:contains("ApproverName")').closest("td").next("td").removeAttr("disabled");
$("div[id$='_UserField_upLevelDiv']").attr("contentEditable",true);
$("span[id$='_UserField']").find("img").show();
return true;
}

</script>

 Here the PreSaveAction is very important. If you did not include this function the value of the people picker column won't be saved in to the list.​ Before saving we are required to enable this control otherwise SharePoint will not be able read value from this control.

 Source: http://www.rajsoftsys.com/sharepoint/?p=183

 After adding this JQuery the control looks like below.

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