My function fails in chrome

[unemployment]

function backspace_delete(e, delete_ele_id) 
{
if (!e) 
{ 
	// IE reports window.event instead of the argument
	e = window.event;
}
var keycode;

if (document.all) 
{
	// IE
	keycode = e.keyCode;
} 
else 
{
	// Not IE
	keycode = e.which;
}

if (keycode == 8 && with_field.value == '')
 {
	if (document.all)
	{
		//IE
		removeElementById(delete_ele_id);
	} 
	else 
	{
		//Non IE
		removeElementById(delete_ele_id);
	}
}
}