What is the issue with this regular expression validator? It is giving syntax error.I have a multiline textbox which can accpet HTML inputs. I should not allow the user to enter any link tags either in the start of the text or anywhere in the middle or at the end.How do i check this using regular expression validator? New to .net. Thanks.\[code\]<asp:RegularExpressionValidator id="EmailLinkValidator" runat="server" controltovalidate="EmailTextBox" display="Dynamic" ValidationExpression="(?m
?:<a )?href|</a>\r?\n?)" cssclass="clsError" errormessage="<%=this.ERR_MSG%>">*</asp:RegularExpressionValidator>\[/code\]
?:<a )?href|</a>\r?\n?)" cssclass="clsError" errormessage="<%=this.ERR_MSG%>">*</asp:RegularExpressionValidator>\[/code\]