JavaScript

  <script type='text/javascript' src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/additional-methods.js"></script>
script type='text/javascript'>//<![CDATA[
$(document).ready(function () {
    // We'll use this flag so we don't have to validate fields before
	// the form has been submitted.
	var validatingForm = false;

	// This line before validate() is called allows
	// chosen menus to be validated
	$.validator.setDefaults({ ignore: ":hidden:not(select)" });

    $('#form1').validate({ // initialize the plugin
        invalidHandler: function() {
	        // Now we can validate the fields onChange
	        validateForm = true;
	    },

        rules: {
                   errorElement: 'div',
                    txtBidDate: "required",
                    txtDueDate: "required",
                    BidTitle: "required",
                    BidID: "required",
                    CategoryID: "required",
                    BidIDFile: "required",
                    AliasID: "required",
                    BidContact: "required",
                    ContactEmail: {
                        required: true,
                        email: true
                    },
            BidType: {
                required: true,
            },
                     BidStatus: "required"
        },
                messages: {
                    txtBidDate: "Please enter Issue Date",
                    txtDueDate: "Please enter Due Date",
                    BidTitle: "Please enter Project Title",
                    BidID: "Please enter ID",
                    CategoryID: "Please select a Category",
                    BidIDFile: "Please select a Bid File",
                    AliasID: "Please select Department Alias",
                    BidContact: "Please enter Bid Contact",
                    BidTitle: "Please enter Project Title",

                    BidType: {
                        required: "Please select Bid Type"
                    },
                    ContactEmail: "Please enter a valid email address",
                    BidStatus: "Please select Bid Status"
                },
         });
   //  Now set an onChange event for the chosen menu
   $("CategoryID").change(function(){

       // Check that we've tried to submit the form
       if(validateForm) {
           // We tried to submit the form, re-validate on change...just to get rid of the message
           $("CategoryID").valid();
       }
});
   $("AliasID").change(function(){

       // Check that we've tried to submit the form
       if(validateForm) {
           // We tried to submit the form, re-validate on change...just to get rid of the message
           $("AliasID").valid();
       }
});
   $("BidType").change(function(){

       // Check that we've tried to submit the form
       if(validateForm) {
           // We tried to submit the form, re-validate on change...just to get rid of the message
           $("BidType").valid();
       }
});
   $("BidStatus").change(function(){

       // Check that we've tried to submit the form
       if(validateForm) {
           // We tried to submit the form, re-validate on change...just to get rid of the message
           $("BidStatus").valid();
       }
});
});//]]>

</script>

<input type="file" id="BidIDFile" name="BidIDFile[]" value="" size="50">