Simple CRM Priority Dropdown to change Due Date

This next situation I ran into, called for a Due Date field and a Ticket Priority Pick List, they requested that when a technician comes into the ticket and changes the priority status it will automatically update the Due Date.  The Due Date is auto-populated with a Normal priority, so the Due Date will be 7 Days after Todays date, This will be pushed forward or back depending on the priority status selected.

For Example If I selected :
High priority will change the Due Date to Todays Date.
Normal priority will push the Due Date back 7 days from Today.
Low priority will push the Due Date back 14 days from Today.
Standby priority will push the Due Date back 30 days from Today.

So, How'd I do this?
I created two fields in CRM 4.0
One is called datedue, which is a basic date field
The second is a Priority picklist with the following types:

Low
Medium
High
Standby

• Open up the Main Form
• Change properties on the Priority Field
• Click Events Tab
• Edit onChange
• Check that the Event is enabled
• Paste the following code:

var PRIORITY_HIGH="High";
var PRIORITY_NORMAL="Medium";
var PRIORITY_LOW="Low";
var PRIORITY_STANDBY="Standby";
var DUE;
var TODAY;
{
TODAY = new Date();
// If Due Date is null, set it to today's date.
DUE = crmForm.all.new_datedue.DataValue;
if (DUE == null)
{
DUE = new Date();
}
// Set the due date based on the value of the Priority field.
switch (crmForm.new_priority.SelectedText) {
case PRIORITY_HIGH:
DUE = TODAY;
break;
case PRIORITY_LOW:
DUE = TODAY.setDate( TODAY.getDate() + 14);
break;
case PRIORITY_NORMAL:
DUE = TODAY.setDate( TODAY.getDate() + 7);
break;
case PRIORITY_STANDBY:
DUE = TODAY.setDate( TODAY.getDate() + 30);
break;
}
crmForm.all.new_datedue.DataValue = DUE;
}

•  Save and Close, Test Changes, Publish the Entity

Adding a CRM 4.0 Related Entity to the Main Form using IFRAME

First create your two entities and relate them together.

• On the main form, create an iframe section
• Create a new IFRAME, place it in the section

URL: about:blank

• Open the Form Properties
• Edit Onload
• Check Event is enabled
• Paste the following code

var navId = "nav_new_new_assets_new_assetitem";
if(document.getElementById(navId) != null)
{
var tmp = document.getElementById(navId).onclick.toString();
tmp = tmp.substring(tmp.indexOf("'")+1, tmp.indexOf(";"));
var loadArea = tmp.substring(0, tmp.indexOf("'"));
var roleOrd = (tmp.indexOf("roleOrd") == -1) ? -1 : tmp.substring( tmp.indexOf("roleOrd"), tmp.lastIndexOf("'")).replace("\x3d", "=");
crmForm.all.IFRAME_Items.src = (roleOrd == -1) ? GetFrameSrc(loadArea) : GetFrameSrc(loadArea) + "&" + roleOrd;
}
function GetFrameSrc(tabSet)
{
if (crmForm.ObjectId != null)
{
var id = crmForm.ObjectId;
var type = crmForm.ObjectTypeCode;
var security = crmFormSubmit.crmFormSubmitSecurity.value;
var path = document.location.pathname.substring(0, document.location.pathname.indexOf("edit.aspx")) + "areas.aspx?";
return (path + "oId=" + id + "&oType=" + type + "&security=" + security + "&tabSet=" + tabSet);
}
else
{
return "about:blank";
}
}

• Now there are two things we need to edit here (items in bold). 
• First one is var navId=
• This needs to be the related entity, but we want the navId, not the URL.
•  Easy way to find this ID, is to use IE Developer Tools.
• Open your main form
• Click Tool > Developer Tools
• Within Developer Tools, Click the ARROW (Select Element by Click)
• Now go back to your main form and click the related entity under details

• A New window will appear in Developer Tools, It should have highlighted the CRM Nav Subarea.
• Locate the ID=

• Next Change is the crmForm.all.IFRAME_Items.src
• Make sure to use your proper iframe ID (Iframe_Items)
• That should be it, Save and Close.
• Publish your entity and make sure the related entity is displaying properly