jquery browser fix for supporting disabled options in selects for IE6 and IE7

jquery.disable-select-option-IE6-IE7-support.js

            // TODO: Remove fix for selects-tags with multiple="multiple" attribute as ölong as it is not supported
            // TODO: Support selects-tags with multiple="multiple" attribute
            // TODO: Support disabling up and down key browsing on disabled options
            // TODO: Check if selecting an an disabled option with up and down key + enter key submits form with disabled value

            $(document).ready(function() {

                if ($.browser.msie && parseFloat($.browser.version) < 8) {
                    // Add disabled color to disabled options
                    $("select").find("option[disabled]").css("color", "graytext");
                    
                    // Select first none diabled option onload
                    $("select").each(function() {
                        var $select = $(this);
                        var $optionsEnabled = $select.find("option").not("[disabled]");
                        if ( $optionsEnabled == [] ) {
                            // Disable select
                            $select.attr("disabled", "disabled");
                        } else {
                            // Select first enabled option
                            $( $optionsEnabled[0] ).attr("selected","selected");
                        }
                    });
                    
                    // Save selected option on load
                    $("select").each(function() {
                        var $select = $(this);
                        $(this).data( "lastSelectValue", $(this).val() );
                    });
                    
                    // Hande deselect options on events
                    $("select").find("[disabled]").addClass("disabled");
                    $("select").change(function(){
                        selectValue(this);
                    });
                    $("select").blur(function(){
                        selectValue(this);
                    });
                    
                    // Dont allow selecting disabled option
                    function selectValue(selectTag) {
                        var $select = $(selectTag);
                        var disabled = $select.find("[value="+$select.val()+"]").hasClass("disabled");
                        if (disabled) {
                            // Select last selected value
                            $select.find("[value="+$select.data("lastSelectValue")+"]").attr("selected","selected");
                        } else {
                            // Save new last selected value
                            $select.data( "lastSelectValue", $select.val() );
                        }
                    }                     
                  
                }

            });