Question

Here on page load i am trying to store the values from form to variables. Later i would like to use those variables (if and only if i have data in that) to other purpose.

This is how i approached ( on page load )

render : function() {
 frm = document.Form;

 if (frm.Name1.value){
                value1 = frm.Name1.value;
        }
 if (frm.Name2.value){
            value2 = frm.Name2.value;
        }
if (frm.Name3.value){
            value3 = frm.Name3.value;
        } 

}

Based on certain condition / selection i will call this function to assign initially loaded values

function add_values ( ) {
      if (value1.length){
            frm.Name1.value = value1;
        }
       if (value2.length){
            frm.Name2.value = value2;
        }
        if (value3.length){
            frm.Name3.value = value3;
        }
}

Error: ( in firebug )

value3 is not defined
[Break On This Error] if (value3.length){ 

What did i try ?

if (undefined != value3)

Answer 1

try

if(typeof value3 != "undefined")

more on typeof