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Validate Email Address


try this example using Javascript

<asp:TextBox ID="txtEMail" onblur="validate_CDetails1()" size="25" CssClass="Form_Text"


<span id="Span3" class="error">
   <div id="div_errorem1" style="text-align: left"></div>

javascript code

function validate_CDetails1()
    var oField = document.frm_registration.txtEMail.value;
    var em = document.frm_registration.txtEMail.value;
    var reg = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;

    if(oField == "")
        document.getElementById('div_errorem1').innerHTML ="Please Enter EMail.";
    else if(reg.test(em) == false)
        document.getElementById('div_errorem1').innerHTML ="Please Re Enter a Valid EMail.";
        document.getElementById('div_errorem1').innerHTML ="";

The above code will work

Good Luck

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