function bbcode_ins(fieldId, tag) {
	field = document.getElementById(fieldId);
	if (tag == 'b' || tag == 'i' || tag == 'u' || tag == 'php' || tag == 'code') {
		if (document.selection) {
			field.focus();
			sel = document.selection.createRange();
			sel.text = '[' + tag + ']'+sel.text+'[/' + tag + ']';
		}
		//MOZILLA/NETSCAPE/SAFARI support
		else if (field.selectionStart || field.selectionStart == 0) {
			var startPos = field.selectionStart;
			var endPos = field.selectionEnd;
			field.focus();
			field.value = field.value.substring(0, startPos) + '[' + tag + '][/' + tag + ']' + field.value.substring(endPos, field.value.length);
		}
	}
}