Project Server - Set Custom Field as readonly on PDP using jQuery

 In Project Server 2010, on Project Detail Page (PDP) user has no option for setting certain Custom Field as readonly. Sometimes, field needs to be set as readonly depending on some other condition or depending on value of another field.

But, there is option for inserting javascript (and jQuery) directly on the page, and, with javascript, you can do almost anything.

SCENARIO:

Let's say that we have one Custom Field called "Employee" that reads values from Lookup Table (values "Yes" and "No") and another Custom Field (plain text field) called "Work Place".

Let's say that we want to set field "Work Place" as readonly if user in field "Employee" selects value "No".


First, HTML Web Part needs to be added on Project Detail Page (Site Actions --> Edit Page --> Add a Web Part).

Just copy the following script into that Web Part that executes our scenario:


<script src="http://code.jquery.com/jquery-latest.js" type="text/javascript"></script>
<script src="http://code.jquery.com/jquery-migrate-1.0.0.js" type="text/javascript"></script>
<script>

$(document).ready(function(){

        //first, we need to attach "onchange" event to "Employee" field, so each change of "Employee"
        //field field will  trigger our function
        var projectType =document.body.getElementsByTagName("INPUT");
        for (i=0; i < projectType.length;++i)
        {
            if(projectType[i].type=="text")
            {
                if(projectType[i].title=="Employee")
                {
                    projectType[i].setAttribute("onchange", function(){MakeReadOnly();})
                }
            }
        }
        //this call triggers on every refresh of the PDP
        MakeReadOnly()
});

function MakeReadOnly()
{     
    var inputs=document.body.getElementsByTagName("INPUT");   

    var fieldWorkPlace;
    var isEmployee = true;

    for (i=0; i < inputs.length;++i)
    {
        if(inputs[i].type=="text")
        {
            if(inputs[i].title=="Employee")
            {
                if(inputs[i].value == "No")
                {
                       isEmployee = false;
                }
            }
           
            if(inputs[i].title=="WorkPlace")
            {
                fieldWorkPlace= inputs[i];
            }
        }
    }
   
    //if "No" is selected, then disable field
    if(isEmployee == false)          
         fieldWorkPlace.disabled = true;
    else
         fieldWorkPlace.disabled = false;
 }

</script>