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08.07.2008 at 08:26PM PDT, ID: 23631644
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9.3

I need to initialize a dropdownlist on the load. event.

Asked by mathieu_cupryk in JavaScript, .NET, Asynchronous Javascript and XML (AJAX)

I have two cascading dropdowns and one none cascading dropdown. I would like to initialize this.
any help would be great.

function month_onchange(sender, e)
            {
               var y = ddlYear.options[ddlYear.selectedIndex].text;
               var m = ddlMonth.value;
           
               // Add an Option object to Drop Down/List Box
               var totalDaysInMonth = daysInMonth(m, y);
               var myLists = document.getElementsByTagName("select")
 
               /*assuming that the select you are interested is <select name=c>...</select> */
               var element = myLists[1];
               element.options.length=0;
               for (var i = 0; i < totalDaysInMonth; i++)
               {
                    element.options[element.options.length] = new Option(i+1, i);
               }                  
            }
           
           
            function year_onchange(sender, e)
            {
                var y = ddlYear.options[ddlYear.selectedIndex].text;
                  var m = ddlMonth.value;
                
               // Add an Option object to Drop Down/List Box
               var totalDaysInMonth = daysInMonth(m, y);
               var myLists = document.getElementsByTagName("select")
 
               /*assuming that the select you are interested is <select name=c>...</select> */
               var element = myLists[1];
               element.options.length=0;
               for (var i = 0; i < totalDaysInMonth; i++)
               {
                    element.options[element.options.length] = new Option(i+1, i);
               }  
                       
             
            }Start Free Trial 
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<script language="javascript" type="text/javascript">
///var usernameCheckerTimer;
///var spanAvailability = $get("spanAvailability");
///Sys.Application.add_load(Register_pageLoad);
 
//            function Register_pageLoad(sender, args)
//            {
//                $find("myCDECountryRegister").add_selectionChanged(Register_SelectedIndexChangedCountry);
//                $find("myCDEDay").add_selectionChanged(Register_SelectedIndexChangedDaysInMonth);
//            }
//        
            var ddlYear = null;
            var ddlMonth = null;
            var ddlDay = null;
            
 
            
            Sys.Application.add_load(page_load);
            Sys.Application.add_unload(page_unload);
 
            function page_load(sender, e)
            {            
               $find("myCDECountryRegister").add_selectionChanged(Register_SelectedIndexChangedCountry);
               ddlMonth =  $get("<%=ddlMonth.ClientID %>");
               ddlYear =   document.getElementById("<%=ddlYear.ClientID%>");
               ddlDay = $get("ddlDay");
               $addHandler(ddlYear, "change", year_onchange);
               $addHandler(ddlMonth, "change", month_onchange);
            }
 
            function page_unload(sender, e)
            {            
               $removeHandler(ddlYear, "change", year_onchange);
               $removeHandler(ddlMonth, "change", month_onchange);
            }
         
         
            function month_onchange(sender, e)
            {
               var y = ddlYear.options[ddlYear.selectedIndex].text; 
               var m = ddlMonth.value;
            
               // Add an Option object to Drop Down/List Box
               var totalDaysInMonth = daysInMonth(m, y);
               var myLists = document.getElementsByTagName("select")
 
               /*assuming that the select you are interested is <select name=c>...</select> */
               var element = myLists[1];
               element.options.length=0;
               for (var i = 0; i < totalDaysInMonth; i++)
               {
                    element.options[element.options.length] = new Option(i+1, i);
               }                   
            }
            
            
            function year_onchange(sender, e)
            {
                var y = ddlYear.options[ddlYear.selectedIndex].text; 
            	var m = ddlMonth.value;
	           
               // Add an Option object to Drop Down/List Box
               var totalDaysInMonth = daysInMonth(m, y);
               var myLists = document.getElementsByTagName("select")
 
               /*assuming that the select you are interested is <select name=c>...</select> */
               var element = myLists[1];
               element.options.length=0;
               for (var i = 0; i < totalDaysInMonth; i++)
               {
                    element.options[element.options.length] = new Option(i+1, i);
               }   
                       
             
            }
            
            function daysInMonth(iMonth, iYear) 
            {
                return 32 - new Date(iYear, iMonth, 32).getDate();
            }
 
 
 
            function Register_SelectedIndexChangedCountry()
            {
                //change the images based on the selected value.
                var countryDropdown = $get('<%=ddlCountryRegister.ClientID%>');
                $get("<%=imgFlagRegister.ClientID%>").src = "./images/flags/" + countryDropdown.value + ".gif";
            }
[+][-]08.08.2008 at 02:09AM PDT, ID: 22188399

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About this solution

Zones: JavaScript, .NET, Asynchronous Javascript and XML (AJAX)
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Solution Provided By: mplungjan
Participating Experts: 1
Solution Grade: A
 
 
 
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