function FileBox() {
    this.inputFocus = FileBox_inputFocus;
    this.inputBlur = FileBox_inputBlur;
}

function FileBox_inputFocus(input, newClass) {
    var formInput = document.getElementById(input);
    if(formInput.value == formInput.defaultValue) {
    	formInput.select();
    	formInput.className = newClass;
    }
}

function FileBox_inputBlur(input, newClass) {
    var formInput = document.getElementById(input);
    if(formInput.value == '') {
	formInput.value = formInput.defaultValue;
	formInput.className = newClass;
    } else if(formInput.value == formInput.defaultValue) {
	formInput.className = newClass;
    }
}