script>
function inc_tag(st_t, en_t)
{ 
	obj = document.forms.mforum.msg;
	obj2 = document.forms.mforum;
	if ((document.selection)) 
	{
		obj.focus();
		obj2.document.selection.createRange().text = st_t+obj2.document.selection.createRange().text+en_t;
	} else 
	{
		obj.focus();
		obj.value += st_t+en_t;
	}
}
</script>