want to ask about ascii in javascript

hi,,
I have tried to wrote code with ascii,I'm still not understand declared ascii in javascript.so this why I'm in this forum.to know the answer.

I have one field, if I input field "05/01/" then I press "tab" from keyboard.I get year from this year, so the value in a field will be "05/01/2009".

<script language="javascript">
function GetYear(){
   var now=new Date();
   year=now.getFullYear();
   if(document.formname.field.value.length==6){
        if(ascii==9){
            field.value=field.value+year;
        }
    }
}
</script>

Code (markup):

I don't know how to declare it in javascript. and I'm still dont know this function where I must put. in onKeyUp or onKeyPress or onKeyDown or onBlur??

if anyone know the answer, please give me the answer and give me a suggestion where I must put that function or any suggestion.

thanks

sela

 

erm, i'd use onkeyup (keypress released).

essentially, something like this (not tested but ought to be fine):

var insertDate = function() {
    // code here to add the date
};

window.onload = function() {
     document.getElementById("dateid").onkeyup = function(e) {
        if (e.keycode == 9 | e.which == 9) { // old netscape based browsers use .which
            // do something with tab.
            insertDate();
        }
        // you probably need to handle shift+tab also - check e.shiftKey
    };

    document.getElementById("dateid").onblur = function() {
        insertDate(); // they can use mouse to unfocus and not tab... 
    };
};

PHP:

 

I will try it.
Thanks for your help (^_^)