function insertTag(tag, targetElement) {
	switch(tag) {
		case 'b':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[b][/b]'; 
			break;
		case 'i':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[i][/i]'; 
			break;
		case 'u':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[u][/u]'; 
			break;
		case 'img':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[img=][/img]'; 
			break;
		case 'url':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[url=][/url]'; 
			break;
		case 'youtube':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[youtube][/youtube]'; 
			break;
		case 'code':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[code][/code]'; 
			break;
		case 'left':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[left][/left]'; 
			break;
		case 'right':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[right][/right]'; 
			break;
		case 'center':
			document.getElementById(targetElement).value = document.getElementById(targetElement).value + '[center][/center]'; 
			break;
		default:
			break;
	}
	
	document.getElementById(targetElement).focus();
}