Event not fired when login

Question

<asp:TextBox type="text" name="firstName" ID="txtFirstName" runat="server"

onblur="RealTimeValidation(this.id,this.value);" oninput="ValidateFormColor(this.id);" onclick="ValidateFormColor(this.id);"

TabIndex="2" />

<span></span>

 

 

 

when i am not register the realtimevalidation and validformcolor function works fine but when i logged in this validaformcolor is work fine but the realtimevalidation i.e onblur() is not working