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datepicker not working with jQuery dialog box

I have datattable of user data, and each row contain edit button to open edit form. I'm open it using jQuery dialog box and submit for using ajax submit, but when loading form datepickers it is not working.
How can I fix this?

You are inverting name and id attributes.
When you use:
$("#activation_on").datepicker(...
jQuery selects the element with id= activation_on because # is the id selector. But your element's id is id="activation_on1".
The same happens on your valid_to field.
You can change their ids or change the jquery to:
$("#activation_on1").datepicker(...
and
$("#valid_to1").datepicker(...
Take a look at a working example on JSFiddle: https://jsfiddle.net/dudu84/42yoLLgg/2/

Prevent user from submit button click

I have got one Kendo UI dropdown box and combobox both are cascading and loading items from DB... and then few more textbox controls and then submit button also....
I made required validation for two textboxes and dropdownList and we can edit items that we are selected in combobox(we can remove also). Some times user clicks the submit button with out properly loading the items in Combobox then I am getting error like Required validation error ....
Is there any way to prevent the user from button click until the all the controls are fully loaded ...
I tried two ways ..
Approach 1 : i have put button property as hidden and then in combobox Databound event made visible the button ... But this approach didn't work..
Approach 2 :
I have tried the suggestions given in this link
$("#submit").prop("disabled", false)
this approach didn't worked for me..
Is there any other approach to prevent user from clicking the submit button until all controls are loaded...
Many thanks in advance...

You can do this:
<input type='submit' id='submit' value='submit' disabled />
<!--disable the button on default-->
and add this js:
$(window).load(function(){
$("#submit").prop("disabled", false); // enable it when page loaded.
});
this solution requires jquery.

On some projects i've used the css visibility property to hide show elements at appropriate times:
http://www.w3schools.com/css/css_display_visibility.asp
This might be what you want.

A display:none style until validation doesn't work for you?
$("#submit").css("display", none)
or
$("#submit").hide()

Unselect a Select Input

I have a "select" input that is programmed to open up a modal box when clicked to get some information before proceeding. That part all works great.
The problem is that once the modal box is up, the select dropdown options are all still visible. I want that select input to go back to being a normal, not clicked on at all, select box.
What javascript or jquery code can I use to make that select dropdown clear away?

I think it is more correct to move handler from click to change. In this case select will be close and keyboard changes also will be processed

Try using this instead:
$('#mySelect').focus(function(event){
event.preventDefault();
// code here
});
If that does't work, try using the preventDefault() with the click event.
The focus will at least allows users navigating fields with the keyboard (tab, etc) instead of the mouse.

Prior to jQuery 1.6
$('#mySelectBox :selected').attr('selected', '');
jQuery 1.6 and higher
$('#mySelectBox :selected').removeProp('selected', '');

I'm not sure that you can do it with standard select tag. Maybe because it still has focus. What I did when I needed a customized select tag is to avoid the select tag completely and use a button which graphically looks like the select button. Look at this page - look at the TAX button and the button to the left of it. There is no select tag, but it works great.

Jquery button label option does not work with input type checkbox

Demoed here: http://jsfiddle.net/dRtaR/2/
The label option of the Jquery UI button does not work.
My goal is to have a label on the button WITHOUT having to specify a </label> html tag.
Can I do this?

Not with this jQueryUI method. From the .button() overview tab:
In addition to basic push buttons, radio buttons and checkboxes (inputs of type radio and checkbox) can be converted to buttons: Their associated label is styled to appear as the button, while the underlying input is updated on click.
When you specify button on a checkbox or radio button it hides the input and styles the associated label.
Is there any reason you can't just write out the label? If you don't have access to the html you could write it out with jQuery. See this horrible example. It might give you an idea of where to look next.

IE not selecting form field when label is clicked an form field is hidden

I am using jQuery to hide form fields (I am manipulating checkboxes and radio buttons).
In FF and Chrome, when I click the associated label, the form field still activates and checks. In IE, that does not happen.
How can I have the label activate the checkboxes/radio buttons in IE?

I've experienced this before as well. You may be better off moving the hidden fields off the screen instead of hiding them.
In fact, I did ask that question on SO:
IE - hidden radio button not checked when the corresponding label is clicked

How are you hiding it? You may need to move it off-screen via some radical css:
.hidden { position:relative; left: -10000 }
And then toggle the .hidden class to show/hide the element.

I've run into this too. IE will not change the value of hidden form fields. You have to unhide them first. Probably the easiest way is to add an onclick action to all labels that are allowed to have hidden form fields. Something like:
$("label.hideablefield").live('click', function(){
var fid = $(this).attr('for');
$('#'+ fid).show();
$('#'+ fid).select(); //or maybe .focus, I'm not sure
});
Obviously, this only turns the field on. You'd need to set up a toggle condition for re-hiding/unselecting.