function topChkKeyWord() {
     var keyword = trim(g("TopSearch1_txt_keyWord").value);
        if (keyword == "") {
            alert("请输入关键词！");
            return false;
        }
        window.location = "/search.aspx?keyword=" + URLencode(keyword);
        return false;

    }

    //兼容ie和firefox
    document.onkeypress = function(eventTag) {
        var event = eventTag || window.event;
        var currentKey = event.charCode || event.keyCode;
        var eventSource = event.srcElement || eventTag.target;
//              alert(eventSource.id);
        //        alert("abc");


        if (currentKey == 13) {
            if (eventSource.id == 'TopSearch1_txt_keyWord') {
                return topChkKeyWord();
            }
            else if (eventSource.id == 'TopSearch1_ImageButton1') {
                return topChkKeyWord();
            }

            if (eventSource.id == 'TopSearch1_txt_keyWord') {
                return chkKeyWord();
            }
            else if (eventSource.id == 'TopSearch1_ImageButton1') {
                return chkKeyWord();
            }

            return false;//返回false避免页面提交。
        }
    }
    
    

    window.onload = function() {
        var loca = self.location;
        document.getElementById('form1').action = self.location;
    }