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问:Asp.net怎么使用JavaScript脚本进行控件验证?

function ValidateControl()
{
    //收货人姓名
    var txtShippingName=document.getElementById(txtShippingNameID).Text;
    //收货人地址
    var txtShippingAddress=document.getElementById(txtShippingAddressID).Text;
    //邮政编码
    var txtPostCodev=document.getElementById(txtPostCodeID).Text;
    //手机号
    var txtMobilePhone=document.getElementById(txtMobilePhoneID).Text;
    //电话号
    var txtPhone=document.getElementById(txtPhoneID).Text;
    //手机正则
    var ValiMobliePhone=/^[1]{1}[3]{1}(\d){9}$/;
    //电话正则
    var ValiPhone=/^((\d){3,4}[-]{1})?([1-9]{1}(\d){5,7})([-]{1}(\d){1,6})?$/;
   
    //非空验证
    if(txtShippingName=="")
    {
        alert('收货人姓名不能为空');
        document.all('txtShippingName').focus();
        return false;
    }
    if(txtShippingAddress=="")
    {
        alert('收货地址不能为空');
        document.all('txtShippingAddress').focus();
        return false


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