How many things will be reusable out of these javascripts.

Hello All Guys,

I need to know about the re usability of the below java script code.

Also if it is reusable then any sample out of it.

var opusUtilities = {
    CRM_ORG_PATH: Xrm.Page.context.getClientUrl() + "/XRMServices/2011/OrganizationData.svc",
    FORM_TYPE_CREATE: 1,

    retrieveProductDescription: function (productId) {
        var description = "";
        var oDataSelect = "/ProductSet?$select=Name&$filter=ProductId eq guid\'" + productId + "\'";
        var product = this.querySingleEntity(oDataSelect);

        if (product != null) {
            description = product.Name;
        }

        return description;
    },

    queryMultipleEntities: function (oDataSelect) {
        var resultEntities = null;
        // Perform a synchronous oData retrieve
        $.ajax({
            type: "GET",
            async: false,
            contentType: "application/json; charset=utf-8",
            datatype: "json",
            url: opusUtilities.CRM_ORG_PATH + oDataSelect,
            beforeSend: function (XMLHttpRequest) { XMLHttpRequest.setRequestHeader("Accept", "application/json"); },
            success: function (data, textStatus, XmlHttpRequest) {
                // The query was successful, so check if there are any records and return them
                if ((data != undefined) && (data.d != undefined) && (data.d.results.length > 0)) {
                    resultEntities = data.d.results;
                }
            },
            error: function (XmlHttpRequest, textStatus, errorThrown) { alert('OData Select Failed: ' + oDataSelect); }
        });

        return resultEntities;
    },

    retrieveProductsDefaultUOM: function (productId) {
        var defaultUOM = null;

        var oDataSelect = "/ProductSet?$select=DefaultUoMId&$filter=ProductId eq guid\'" + productId + "\'";
        var product = this.querySingleEntity(oDataSelect);

        if (product != null) {
            defaultUOM = product.DefaultUoMId;
        }

        return defaultUOM;
    },



    UserHasRole: function (roleName) {
        var bHasRole = false;

        var oDataSelect = "/RoleSet?$filter=Name eq \'" + roleName + "\'";
        var roles = this.queryMultipleEntities(oDataSelect);

        if (roles.length > 0) {
            var currentUserRoles = Xrm.Page.context.getUserRoles();
            for (var x = 0; x < roles.length; x++) {
                if (bHasRole == true) {
                    break;
                }
                var rData = roles[x];
                var retrievedRole = rData.RoleId;
                for (var i = 0; i < currentUserRoles.length; i++) {
                    var userRole = currentUserRoles[i];

                    if (this.GuidsAreEqual(userRole, retrievedRole)) {
                        bHasRole = true;
                        break;
                    }
                }
            }
        }

        return bHasRole;
    },

    queryToCheckConditions: function (oDataSelect) {
        var resultBool = false;

        // Perform a synchronous oData retrieve
        $.ajax({
            type: "GET",
            async: false,
            contentType: "application/json; charset=utf-8",
            datatype: "json",
            url: opusUtilities.CRM_ORG_PATH + oDataSelect,
            beforeSend: function (XMLHttpRequest) { XMLHttpRequest.setRequestHeader("Accept", "application/json"); },
            success: function (data, textStatus, XmlHttpRequest) {
                // The query was successful, so check if a record was returned
                if ((data != undefined) && (data.d != undefined) && (data.d.results[0] != null) && (data.d.results.length == 1)) {
                    resultBool = true;
                }
            },
            error: function (XmlHttpRequest, textStatus, errorThrown) { alert('OData Select Failed: ' + oDataSelect); }
        });

        return resultBool;
    },

    GuidsAreEqual: function (guid1, guid2) {
        var isEqual = false;
        if (guid1 == null || guid2 == null) {
            isEqual = false;
        }
        else {
            isEqual = guid1.replace(/[{}]/g, "").toLowerCase() == guid2.replace(/[{}]/g, "").toLowerCase();
        }

        return isEqual;
    },

    setBillToShipToCustomerNames: function () {
        if ((Xrm.Page.ui.getFormType() == opusUtilities.FORM_TYPE_CREATE) || (Xrm.Page.getAttribute("new_billtocustomer").getValue() == null && Xrm.Page.getAttribute("new_shiptocustomer").getValue() == null)) {
            if (Xrm.Page.getAttribute("customerid").getValue() != null) {
                var customerLookupItem = Xrm.Page.getAttribute("customerid").getValue();

                if (customerLookupItem != null) {
                    var customerName = customerLookupItem[0].name;

                    Xrm.Page.getAttribute("new_billtocustomer").setValue(customerName);
                    Xrm.Page.getAttribute("new_shiptocustomer").setValue(customerName);
                }
            }
        }
    },

    setOptionSetByOptionText: function (optionsetAttribute, optionText) {
        var options = Xrm.Page.getAttribute(optionsetAttribute).getOptions();
        for (i = 0; i < options.length; i++) {
            if (options[i].text == optionText) {
                Xrm.Page.getAttribute(optionsetAttribute).setValue(options[i].value);
            }
        }
    },

    setRequirementLevel: function (fieldName, reqLevel) {
        Xrm.Page.getAttribute(fieldName).setRequiredLevel(reqLevel);
    },

    setDisabled: function (fieldName, accessible) {
        Xrm.Page.ui.controls.get(fieldName).setDisabled(accessible);
    },

    setVisibility: function (fieldName, visible) {
        Xrm.Page.ui.controls.get(fieldName).setVisible(visible);
    },

    setFieldValue: function (fieldToSet, setToValue) {
        if (Xrm.Page.getAttribute(fieldToSet) != null) {
            Xrm.Page.getAttribute(fieldToSet).setValue(setToValue);
            Xrm.Page.getAttribute(fieldToSet).setSubmitMode("always");
        }
    },

    getFieldValue: function (fieldToGet) {
        return Xrm.Page.getAttribute(fieldToGet).getValue();
    },

    getLookupId: function (c) {
        //c = control name
        var lookupObject = Xrm.Page.getAttribute(c);

        if (lookupObject != null) {
            var lookUpObjectValue = lookupObject.getValue();

            if ((lookUpObjectValue != null)) {
                //var lookuptextvalue = lookUpObjectValue[0].name;
                var lookupid = lookUpObjectValue[0].id;
            }
        }
        return lookupid;
    },

    getLookupName: function (c) {
        //c = control name
        var lookupObject = Xrm.Page.getAttribute(c);
        var lookuptextvalue = "";

        if (lookupObject != null) {
            var lookUpObjectValue = lookupObject.getValue();

            if ((lookUpObjectValue != null)) {
                lookuptextvalue = lookUpObjectValue[0].name;
            }
        }
        return lookuptextvalue;
    },

    saveForm: function () {
        return Xrm.Page.data.entity.save();
    },

    getEntityId: function () {
        return Xrm.Page.data.entity.getId();
    },

    querySingleEntity: function (oDataSelect) {
        var resultEntity = null;

        // Perform a synchronous oData retrieve
        $.ajax({
            type:"GET",
            async: false,
            contentType: "application/json; charset=utf-8",
            datatype: "json",
            url: opusUtilities.CRM_ORG_PATH + oDataSelect,
            beforeSend: function (XMLHttpRequest) { XMLHttpRequest.setRequestHeader("Accept", "application/json"); },
            success: function (data, textStatus, XmlHttpRequest) {
                // The query was successful, so check if there is a record and return it
                if ((data != undefined) && (data.d != undefined) && (data.d.results[0] != null)) {
                    resultEntity = data.d.results[0];
                }
            },
            error: function (XmlHttpRequest, textStatus, errorThrown) { alert('OData Select Failed: ' + oDataSelect); }
        });

        return resultEntity;
    },

    getJsonObjectForField: function (responseFieldName) {
        var jsonText = opusUtilities.getFieldValue(responseFieldName);

        if (jsonText !== null && jsonText !== undefined) {
            try {
                var responseObj = JSON.parse(jsonText);
                if (responseObj !== null) {
                    return responseObj;
                }
            }
            catch (exception) {
                alert("json parsing error.");
                return null;
            }
        }

        // always return null if jsonText is null or undefined
        return null;
    },


    ChangeAllAttributeGradientMask: function () {
        var elements = document.getElementsByClassName("ms-crm-Inline-GradientMask");
        for (var i = 0; i < elements.length; i++) {
            if (elements[i] != null) {
                elements[i].style.display = "none";
            }
        }
    },

    ChangeBackgroundColor: function (Control) {
        if (Control != null) {
            Control.style.backgroundColor = "#F3F3F4";
        }
    },
}