HTML的Select控件，C#的DropDownList服务器控件

设置父类型Display属性之后，在IE6/7上无效

直接将下段javascript脚本添加到页面中即可

    
         window.onload = function () {        if (document.getElementsByTagName) {            var s = document.getElementsByTagName("select");            if (s.length > 0) {                window.select_current = new Array();                for (var i = 0, select; select = s[i]; i++) {                    select.onfocus = function () {                        window.select_current[this.id] = this.selectedIndex;                    }                    select.onchange = function () {                        restore(this);                    }                    emulate(select);                }            }        }    }     function restore(e) {        if (e.options[e.selectedIndex].disabled) {            e.selectedIndex = window.select_current[e.id];        }    }     function emulate(e) {        for (var i = 0, option; option = e.options[i]; i++) {            if (option.disabled) {                option.style.color = "graytext";            } else {                option.style.color = "menutext";            }        }    }