<myText:Textbox ID="txt" runat="server" Visible="true" /> <asp:Button ID="btnSumbit" runat="server" Text="Validate user control" OnClientClick="javascritp:return IsFilled()" />
var a=document.getElementById('form1').elements("txt$txt"); if(a.value=='') { alert("please enter value"); return false; }
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First Name: <asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox><br /> Last Name: <asp:TextBox ID="txtLastName" runat="server"></asp:TextBox><br />
<script type="text/javascript"> function Validate() { var txtFirstName = document.getElementById('<%=UserControl1.FindControl("txtFirstName").ClientID %>'); var txtLastName = document.getElementById('<%=UserControl1.FindControl("txtLastName").ClientID %>'); if (txtFirstName.value == "") { alert("Please enter First Name"); return false; } if (txtLastName.value == "") { alert("Please enter Last Name"); return false; } } </script>
<asp:Button ID="btnValidate" runat="server" Text="Validate" OnClientClick="return Validate()" />
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