<!--

function lockBackSpace (event)
{
	var obj = window.event.srcElement;
	
	if (obj && obj.tagName && ((obj.tagName.toLowerCase() == 'input' && obj.type == 'text') || obj.tagName.toLowerCase() == 'textarea'))
		return true;
	
	return (window.event.keyCode == 8) ? false : true;
}

document.onkeydown = lockBackSpace;

//-->