function start(){
	document.getElementById('op2i').style.background=BG1;
}

function up(id){
d=0;
while(d < 5){
	++d;
	var ok='op'+d+'';
	if(ok==id){
		document.getElementById(id).style.display='block';
		if(id=='op2') {
			document.getElementById(id+'i').style.background=BG1;
		} else if(id=='op5') {
			document.getElementById(id+'i').style.background=BG2;
		} else {
			document.getElementById(id+'i').style.background=BG;
		}
	} else {
		document.getElementById(ok).style.display='none';
		document.getElementById(ok+'i').style.background='none';
	}
}
}

function overlay() {
	var overlay = 	$("div#overlay");
	if(overlay.is(':hidden'))
		overlay.show("normal");
	else
		overlay.hide("normal");
	return false;
}

function tag(tag1, tag2) {
	var textfield = document.getElementById('addBBhere');
	if (document.selection) {
		textfield.focus();
		var sel = document.selection.createRange(); 
		sel.text = tag1 + sel.text + tag2; 
	} else {
		var len = textfield.value.length; 
		var start = textfield.selectionStart; 
		var end = textfield.selectionEnd; 
		var scrollTop = textfield.scrollTop;
		var scrollLeft = textfield.scrollLeft;
		var sel = textfield.value.substring(start, end);
		var rep = tag1 + sel + tag2; 
		textfield.value =  textfield.value.substring(0,start) + rep + textfield.value.substring(end,len); 
		textfield.scrollTop = scrollTop; 
		textfield.scrollLeft = scrollLeft; 
   }
}