check my javascript and give me error

Dharmesh Sharma

16y9.3k.NET

i have three dropdown in asp.net Day month year

now i chech the wich one is has select and give me message

this is java script

  function validdate(obj1,obj2,obj3)
        {
        if((document.getElementById(obj1).value=="Day")&&(document.getElementById(obj2).value=="Month")&&((document.getElementById(obj3).value=="Year")))
            {
               document.getElementById('<%=ltmsg.ClientID%>').innerText='Date is mandatory.';
            }
            else if((document.getElementById(obj1).value=="Day")&&(document.getElementById(obj2).value=="Month"))
            {
             document.getElementById('<%=ltmsg.ClientID%>').innerText='Date is mandatory.';
            }
            else if(document.getElementById(obj1).value=="Day")
            {
             document.getElementById('<%=ltmsg.ClientID%>').innerText='Date is mandatory.';
            }
            else if(document.getElementById(obj2).value=="Month")
            {
            document.getElementById('<%=ltmsg.ClientID%>').innerText='Month is mandatory.';
            }
            else if(document.getElementById(obj3).value=="Year")
            {
            document.getElementById('<%=ltmsg.ClientID%>').innerText='Year is mandatory.';
            }
            else
            {
            document.getElementById('<%=ltmsg.ClientID%>').innerText='';
            }
            
        }

n this is c# code in form load

 ddl_day.Attributes.Add("onchange", "javascript:validdate('" + ddl_day.ClientID + "','" + ddl_month.ClientID + "','" + ddl_year.ClientID + "');");
        ddl_month.Attributes.Add("onchange", "javascript:validdate('" + ddl_day.ClientID + "','" + ddl_month.ClientID + "','" + ddl_year.ClientID + "');");
        ddl_year.Attributes.Add("onchange", "javascript:validdate('" + ddl_day.ClientID + "','" + ddl_month.ClientID + "','" + ddl_year.ClientID + "');");

please help me

6 Replies

Know the answer? Post it — somebody with the same question will find it here.

Arshad16y ago
Hi,

You have to keep that java script function in side the body or at the end of the body element, then it will work. coz ur doing runtime binding, might be coz of that ur getting that error. just try once.

Regards,
Arshad
0
Suthish Nair16y ago
That must work..
Try hardcoding ClientID...
document.getElementById('<%=ddl_day.ClientID%>').value
0
Dharmesh Sharma16y ago
hello

Raghavendra u

now i m geting this error

Microsoft JScript runtime error: Object expected
0
Raghavendra U16y ago
hi, try this

   function validdate(obj1,obj2,obj3)
   {
   var day=document.getElementById(obj1).options[document.getElementById(obj1).selectedIndex].value(or)text;
   var month=document.getElementById(obj2).options[document.getElementById(obj2).selectedIndex].value(or)text;
   var year=document.getElementById(obj3).options[document.getElementById(obj3).selectedIndex].value(or)text;
   if((day=="Day")&&(month=="Month")&&((year=="Year")))
   {
   document.getElementById('<%=ltmsg.ClientID%>').innerText='Date is mandatory.';
   }
   else if((day=="Day")&&(month=="Month"))
   {
   document.getElementById('<%=ltmsg.ClientID%>').innerText='Date is mandatory.';
   }
   else if(day=="Day")
   {
   document.getElementById('<%=ltmsg.ClientID%>').innerText='Date is mandatory.';
   }
   else if(month=="Month")
   {
   document.getElementById('<%=ltmsg.ClientID%>').innerText='Month is mandatory.';
   }
   else if(year=="Year")
   {
   document.getElementById('<%=ltmsg.ClientID%>').innerText='Year is mandatory.';
   }
   else
   {
   document.getElementById('<%=ltmsg.ClientID%>').innerText='';
   }

   }
0
Dharmesh Sharma16y ago
i m get this error

Microsoft JScript runtime error: 'document.getElementById(...)' is null or not an object
0
Suthish Nair16y ago
Darmesh,
What error you facing... rewrite ur code..
String s = String.Format("javascript:validdate('{0}', '{1}', '{2}')", ddl_day.ClientID , ddl_month.ClientID, ddl_year.ClientID);
ddl_day.Attributes.Add("onchange", s);
ddl_month.Attributes.Add("onchange", s);
ddl_year.Attributes.Add("onchange", s);

0