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accesing controls on cotent pages using java script

Posted By:      Posted Date: August 31, 2010    Points: 0   Category :ASP.Net
i had a webform which used javascript for calander <head> <script language="javascript" src="Calendar.js" type="text/javascript"></script> </head> . . . <asp:TextBox ID="txtDateLeaving" runat="server" Enabled="false"></asp:TextBox> <a onclick="showCalendarControl(txtDateLeaving);" href="#"> <img src="calendar.gif" style="width: 20px; height: 20px" border="0" alt="cal" /></a> it was wrking perfectly . .but i am not able to run it using master pages.. when i try to access control on the content pageit says txtDateLeaving is not defined..can anybdy tell me how shld i achieve the same functionality using master n content pages..

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