How to execute a statement in JS after concating it

Consider below JS statement

UploadFrm.DropDownName.appendChild(myElement);

I will be passing the value for "DropDownName" as arguement....

I cannot staright the way use that variable "DropDownName" in that single line statement, its throwing out error

so i did the concatination like below one,...

var append = "UploadFrm." + DropDownName + ".appendChild(myElement)";

How can i execute the statement which is stored as string in the variable "append".

 

Hello please, is anybody there to help me out?
This may seem very very basic doubt......even silly...
but I wonder if u cud help me out..

is problem understandable??

 

Hi,

Not sure exactly what you are asking, but...

If you are wanting to access a control that is passed by name, use:
document.getElementById(DropDownName)

If you are wanting to execute a javascript function, check out the eval function.

 

thanks a lot BurgerKing.

I was just looking out for function like "eval"

as i am being beginner for this JavaScript...i had struggled to get it done..

As per your help a big messy code was commonised and reduced

 

also can use
var something = function() { a_pre_defined_function(Val, Val2) };