How to pass parameters to ********** Functions from C#?

[C# Programming]

Hi to everyone,

I'm just trying to pass parameter to a ********** function from C# code.
The parameterless function is as shown in part1, but I want it to be parametric therefore, I made a bit changes as shown in part2:

--- part1 ---
function next(){

var pass = document.getElementById("ctl17_password");

if(********event && ********event.keyCode == 13) {
pass.focus();
return false;
}
else
return true;

}

In C# I use the below code:
UserName.Attributes.Add("onkeypress", "return next()");

THIS WAY EVERYTHING IS OK.
-------------

--- part2 ---
function next(parameter) {

var pass = document.getElementById(parameter);

if (********event && ********event.keyCode == 13) {
pass.focus();
return false;
}
else
return true;

}

In C# I use the below code:
UserName.Attributes.Add("onkeypress", "return next(ctl17_password)"); --- BUT THIS DOES NOT WORK, I'm not also sure about passing the "parameter" variable as: getElementById(parameter);

-------------

I made some search on this issue, but couldn't find exactly what I needed. Could you please help me?http://www.barakasoft.com/script/Forums/Images/smiley_confused.gif

Thank you very much

Regards,

codddy