function echeck(str) {

        var at = "@"
        var dot = "."
        var lat = str.indexOf(at)
        var lstr = str.length
        var ldot = str.indexOf(dot)
        if (str.indexOf(at) == -1) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(at) == -1 || str.indexOf(at) == 0 || str.indexOf(at) == lstr) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(dot) == -1 || str.indexOf(dot) == 0 || str.indexOf(dot) == lstr) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(at, (lat + 1)) != -1) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.substring(lat - 1, lat) == dot || str.substring(lat + 1, lat + 2) == dot) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(dot, (lat + 2)) == -1) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(" ") != -1) {
            alert("Invalid E-mail ID")
            return false
        }

        return true
    }

    function ValidateDCEmail() {

        //var emailID = document.getElementById("#<%=txtEmail.ClientID %>");
        var emailID = document.getElementById("ctl00_Body_HomePageDiscountCoupon1_txtEmail");
        if ((emailID.value == null) || (emailID.value == "")) {
            alert("Please Enter your Email ID")
            emailID.focus()
            return false
        }
        if (echeck(emailID.value) == false) {
            emailID.value = ""
            emailID.focus()
            return false
        }
        return true
    }
    function ValidateSOEmail() { 
    
    
        //var emailID = document.getElementById("#<%=txtSpecialOffer.ClientID %>");        
        var emailID = document.getElementById("ctl00_footer1_ctl00_ctl00_SpecialOffersSignup_txtSpecialOffer");
        
        
        if ((emailID.value == null) || (emailID.value == "")) {
            alert("Please Enter your Email ID")
            emailID.focus()
            return false
        }
        if (echeck(emailID.value) == false) {
            emailID.value = ""
            emailID.focus()
            return false
        }
        return true
    }