disassociate

var disassociate = function (relationshipName, targetEntityName, targetId, relatedEntityName, relatedBusinessEntities, callback) {
        ///<summary>
        /// Sends synchronous/asynchronous request to disassociate records.
        ///</summary>
        ///<param name="relationshipName" type="String">
        /// A JavaScript String corresponding to the relationship name
        /// that is used for disassociate operations.
        /// </param>
        ///<param name="targetEntityName" type="String">
        /// A JavaScript String corresponding to the schema name of the target entity
        /// that is used for disassociate operations.
        /// </param>
        ///<param name="targetId" type="String">
        /// A JavaScript String corresponding to the GUID of the target entity
        /// that is used for disassociate operations.
        /// </param>
        ///<param name="relatedEntityName" type="String">
        /// A JavaScript String corresponding to the schema name of the related entity
        /// that is used for disassociate operations.
        /// </param>
        ///<param name="relationshipBusinessEntities" type="Array">
        /// A JavaScript Array corresponding to the collection of the related entities as BusinessEntity
        /// that is used for disassociate operations.
        /// </param>
        ///<param name="callback" type="Function">
        /// A Function used for asynchronous request. If not defined, it sends a synchronous request.
        /// </param>
        var relatedEntities = relatedBusinessEntities;

        relatedEntities = isArray(relatedEntities) ? relatedEntities : [relatedEntities];

        var output = [];
        for (var i = 0; i < relatedEntities.length; i++) {
            if (relatedEntities[i].id != '') {
                output.push("<a:EntityReference>",
                                "<a:Id>", relatedEntities[i].id, "</a:Id>",
                                "<a:LogicalName>", relatedEntityName, "</a:LogicalName>",
                                "<a:Name i:nil='true' />",
                            "</a:EntityReference>");
            }
        }

        var relatedXml = output.join("");

        var request = [
            "<request i:type='a:DisassociateRequest' xmlns:a='http://schemas.microsoft.com/xrm/2011/Contracts'>",
                "<a:Parameters xmlns:b='http://schemas.datacontract.org/2004/07/System.Collections.Generic'>",
                    "<a:KeyValuePairOfstringanyType>",
                        "<b:key>Target</b:key>",
                        "<b:value i:type='a:EntityReference'>",
                            "<a:Id>", targetId, "</a:Id>",
                            "<a:LogicalName>", targetEntityName, "</a:LogicalName>",
                            "<a:Name i:nil='true' />",
                        "</b:value>",
                    "</a:KeyValuePairOfstringanyType>",
                    "<a:KeyValuePairOfstringanyType>",
                        "<b:key>Relationship</b:key>",
                        "<b:value i:type='a:Relationship'>",
                            "<a:PrimaryEntityRole i:nil='true' />",
                            "<a:SchemaName>", relationshipName, "</a:SchemaName>",
                        "</b:value>",
                    "</a:KeyValuePairOfstringanyType>",
                    "<a:KeyValuePairOfstringanyType>",
                    "<b:key>RelatedEntities</b:key>",
                    "<b:value i:type='a:EntityReferenceCollection'>",
                        relatedXml,
                    "</b:value>",
                    "</a:KeyValuePairOfstringanyType>",
                "</a:Parameters>",
                "<a:RequestId i:nil='true' />",
                "<a:RequestName>Disassociate</a:RequestName>",
            "</request>"
        ].join("");

        var async = !!callback;

        return doRequest(request, "Execute", async, function (resultXml) {
            var response = jQuery(resultXml).find('ExecuteResult').eq(0);
            var result = crmXmlDecode(response.text());
            if (!async)
                return result;
            else
                callback(result);
            // ReSharper disable NotAllPathsReturnValue
        });
        // ReSharper restore NotAllPathsReturnValue
    };