/* Function to insert an Image */
function insertIMG(field_id) {
	var imgURL = prompt ("Please enter external image URL: (You must host image yourself)","http://");
	
	if (imgURL != null) {
		document.getElementById(field_id).value += "[img]" + imgURL + "[/img]";
	}
}

/* Function to insert an link */
function insertURL(field_id) {
	var linkURL = prompt ("Please enter website URL:","http://");
	
	if (linkURL != null) {
		document.getElementById(field_id).value += "[url]" + linkURL + "[/url]";
	}
}

/* Function to insert Styles */
function insertStyle(style_type,field_id) {
	document.getElementById(field_id).value += "[" + style_type + "]" + 'YOUR TEXT HERE' + "[/" + style_type + "]";
}