Javascript Validation

[veenna]

hi,

i have 20 madatory text boxes in one page.and i want to do validation using javascript.For that i am calling following function in button click.

function validate()
{
 var obj1 = document.getElementById('<%=txtMovie.ClientID%>').id; 
 
         for(var i=1;i<20;i++)
           {
                 var txtID = "obj" + i;
               var txtBox= document.getElementById(txtID);
 
              if(txtID.value.length == 0)
                {
                 alert("something");;
                   return false;           
             }
          }    
}
 

But in this line i am not able to get the control

document.getElementById(txtID)

.

How can i do this??
any help??

Regards,
Veena

[acoder]

Show the corresponding HTML. Are you sure the IDs of the text boxes are "obj1", "obj2", etc.?

[veenna]

hi acoder,

thank u for reply.

IDs of text boxes are different.In the above function i will be declaring obj1 ,obj2 as variables and i will assign ids to it.

var obj1 = document.getElementById('<%=txtMovie.ClientID%>');            
var obj2 = document.getElementById('<%=txtCMovie.ClientID%>'); 
var obj3 = document.getElementById('<%=txtNieMovie.ClientID%>'); 
var obj4 = document.getElementById('<%=txtRelDate.ClientID%>'); 
var obj5= document.getElementById('<%=txtLimDate.ClientID%>'); 

So i want to find the control in foor loop.

regards
veena

[acoder]

In that case, try:

var txtBox = window["obj" + i];

[veenna]

I tried with ur code but value is undefined.

[RamananKalirajan]

Why can you get the objects by

var inpObj = document.getElementsByTagName('input');
for(var i=0;i<inpObj.length;i++)
{
   if(inpObj.type="text"||inpObj.type="TEXT")
    {
         //do Validation
    }
}

Thanks and Regards
Ramanan Kalirajan

[Dormilich]

@RamananKalirajan
this code won't work as intended...

for(var i=0;i<inpObj.length;i++)
{
   // note the == and the NodeList variable
   if("text" == inpObj[i].type.toLowerCase())
    {
         //do Validation
    }
}

[veenna]

But i cant use the above code because i have to display different messages based on text box id.

thanks
veena

[Dormilich]

the do something like

var message = {
  id_1: "fool",
  id_2: "idiot",
  // and so on
};
// validation
alert(message[inpObj[i].id]);