Change Lookup Default Search Field and Operator

var lookupId = lueContact.ClientID;
var defaultField = "Email";
var defaultOperator = "gt";

ScriptManager.RegisterStartupScript(this, GetType(), "script_CustomizeLookup", @"
require(['dojo/aspect', 'Sage/UI/SearchConditionWidget'], function(aspect, SearchConditionWidget) {
    aspect.after(SearchConditionWidget.prototype, '_setToDefaultOperator', function() {
        var lookupId = '%LOOKUP%';
        if (this.id.toLowerCase().substring(0, lookupId.length) == lookupId.toLowerCase()) {
            this._operatorSelect.set('value', '%OP%');
        }
    });
    aspect.after(SearchConditionWidget.prototype, '_setToDefaultField', function() {
        var lookupId = '%LOOKUP%';
        if (this.id.toLowerCase().substring(0, lookupId.length) == lookupId.toLowerCase()) {
            this._fieldNameSelect.set('value', '%FIELD%');
        }
    });
});
".Replace("%LOOKUP%", lookupId).Replace("%FIELD%", defaultField).Replace("%OP%", defaultOperator), true);