You don't need to re-use the DOM ready listener ("$(function(){});") like that; just one's enough:
Code:
$(function() {
$("#<%= DT5.ClientID %>").datepicker();
$("#<%= DT6.ClientID %>").datepicker();
$("#<%= DT1.ClientID %>").datepicker();
$("#<%= DT2.ClientID %>").datepicker();
$("#<%= DT3.ClientID %>").datepicker();
$("#<%= DT4.ClientID %>").datepicker();
});
...and you could comma-delineate your selectors:
Code:
$(function() {
$("#<%= DT5.ClientID %>, "+
"#<%= DT6.ClientID %>, "+
"#<%= DT1.ClientID %>, "+
"#<%= DT2.ClientID %>, "+
"#<%= DT2.ClientID %>, "+
"#<%= DT3.ClientID %>, "+
"#<%= DT4.ClientID %>").datepicker();
});
...or use a single class name instead of IDs to apply the datepicker.
None of that should be related to your problem though. Can you describe in more detail how it's not working? Does the picker box show up? Does it not respond to clicking? etc.