function checkEnter(e){ //e is event object passed from function invocation
        var characterCode; //literal character code will be stored in this variable

        if(e && e.which){ //if which property of event object is supported (NN4)
                e = e;
                characterCode = e.which; //character code is contained in NN4's which property
        }
        else{
                e = event;
                characterCode = e.keyCode; //character code is contained in IE's keyCode property
        }

        if(characterCode == 13){ //if generated character code is equal to ascii 13 (if enter key)
                //document.forms[0].submit(); //submit the form
                return true;
        }
        else{
                return false;
        }

}

function $(v) {

	return document.getElementById(v);

}