Setting attribute description as tooltip for fields

If you want to give the end user some information about the meaning of a field, one way to do so is using tooltips. a33ik wrote a javascript that retrieves the field descriptions from the entity definition and attaches them as a tooltip.

Now it finally makes sense to fill out the description field:
   

Here’s the script to be placed OnLoad of the form:

SetTooltips = function()
{
    var request = "" + 
    "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
    "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">" +
    GenerateAuthenticationHeader() +
    "  <soap:Body>" +  
    "    <Execute xmlns=\"http://schemas.microsoft.com/crm/2007/WebServices\">" +
    "      <Request xsi:type=\"RetrieveEntityRequest\">" +
    "        <RetrieveAsIfPublished>true</RetrieveAsIfPublished>" +
    "        <EntityItems>IncludeAttributes</EntityItems>" +
    "        <LogicalName>" + crmForm.ObjectTypeName + "</LogicalName>" +
    "      </Request>" +
    "    </Execute>" +
    "  </soap:Body>" + 
    "</soap:Envelope>";

    var xmlHttpRequest = new ActiveXObject("Msxml2.XMLHTTP");

    xmlHttpRequest.Open("POST", "/mscrmservices/2007/MetadataService.asmx", false);
    xmlHttpRequest.setRequestHeader("SOAPAction","http://schemas.microsoft.com/crm/2007/WebServices/Execute");
    xmlHttpRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
    xmlHttpRequest.setRequestHeader("Content-Length", request.length);
    xmlHttpRequest.send(request);

    var result = xmlHttpRequest.responseXML;


    for(var i = 0; i < crmForm.all.length; i++)
    if(crmForm.all[i].title != null && crmForm.all[i].title != 'undefined')
    {
        var fieldName = crmForm.all[i].id;

        var desc = result.selectSingleNode("//EntityMetadata/Attributes/Attribute[LogicalName='" + fieldName + "']/Description/UserLocLabel/Label");
        try
        {
            if(desc != null) 
            {
                crmForm.all[fieldName + '_c'].title = desc.nodeTypedValue;
                crmForm.all[fieldName + '_d'].title = desc.nodeTypedValue;
            }
        }
        catch(e) {}
    }
}

SetTooltips();

And here is the result: