function SearchValidate()
    {
        var txtSearch = document.getElementById("txtSearch");
        
        if(txtSearch.value == "")
        {
            alert("请输入完整要搜索的条件！");
            document.getElementById("txtSearch").focus();
            return false;
        }
        return true;
    }

    function formValidate()
        {
             var txtName = document.getElementById("txtName");
             document.getElementById("spanName").style.display="none";
             if(txtName.value == "")
             {
                document.getElementById("spanName").style.display="block";
                document.getElementById("txtName").focus();
                return false;
             }
             
             var txtPhone = document.getElementById("txtPhone");
             document.getElementById("spanPhone").style.display="none";
             if(txtPhone.value == "")
             {
                document.getElementById("spanPhone").style.display="block";
                document.getElementById("txtPhone").focus();
                return false;
             }
             else
             {
                 var txtEmail = document.getElementById("txtEmail");
                 document.getElementById("spanEmail").style.display="none";
                 if(txtEmail.value == "")
                 {
                    document.getElementById("spanEmail").style.display="block";
                    document.getElementById("txtEmail").focus();
                    return false;
                 }
                 else
                 {
                    if(isEmail(txtEmail.value) == true)
                    {
                         var txtTopic = document.getElementById("txtTopic");
                         document.getElementById("spanTopic").style.display="none";
                         if(txtTopic.value == "")
                         {
                            document.getElementById("spanTopic").style.display="block";
                            document.getElementById("txtTopic").focus();
                            return false;
                         }
                         
                         var txtQuestionContent = document.getElementById("txtQuestionContent");
                         document.getElementById("spanQuestionContent").style.display="none";
                         if(txtQuestionContent.value == "")
                         {
                            document.getElementById("spanQuestionContent").style.display="block";
                            document.getElementById("txtQuestionContent").focus();
                            return false;
                         } 
                    }
                    else
                    {
                        return false;
                    }
                 }
                
             }
             
             return true;
         }
         
        //邮件正则表达式验证
         function isEmail(str) {
            //定义正则表达式不能用引号引起来
            //var myReg = /^[-_A-Za-z0-9]+@([_A-Za-z0-9]+.)+[A-Za-z0-9]...{2,3}$/;
            var myReg =/^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/;
            document.getElementById("spanEmail").style.display="none";
            document.getElementById("spanEmail2").style.display="none";
            if(str != "")
            {
                if(myReg.test(str))
                {
                    document.getElementById("spanEmail2").style.display="none";
                    return true;
                }
                document.getElementById("spanEmail2").style.display="block";
                return false;
            }
            else
            {
                document.getElementById("spanEmail").style.display="block";
            }
        }