js doubt cannot able to solve HELP MEEE

[rajmohan]

i am using java script function in php  i.e i am having more text fields and i want to validate in single function  whether the user entered or not . if the user dosent fill it alert message should display other return true.

fields are username,password,confirmpassword,age,date,etc....

i want to pass this name to a function that should check it and return back

who to write it

function validate( // here the names)
{

if(document.form1.?.value="")
{
alert("Enter thefield"+?);
return false;
}

return true;
}