// By El Bekko

function add_smiley(smileytext)
{
	var textarea;
	
	elems = document.getElementsByTagName('textarea');
	var i;
	for(i = 0; i != elems.length; i++)
		if(elems[i].name == 'req_message' || elems[i].name == 'signature')
			textarea = elems[i];
	
	var caretpos = caret(textarea);
	var areatext = textarea.value;
	var newtext = rtrim(areatext.substr(0, caretpos)) + ' ' + smileytext + ' ' + ltrim(areatext.substr(caretpos));
	
	textarea.value = newtext;
}

/* Function courtesy of http://www.csie.ntu.edu.tw/~b88039/html/jslib/caret.html */
function caret(node)
{
	node.focus(); 
	/* without node.focus() IE will return -1 when focus is not on node */
	if(node.selectionStart)
		return node.selectionStart;
	else if(!document.selection)
		return 0;
	
	var c	= "\001";
	var sel	= document.selection.createRange();
	var dul	= sel.duplicate();
	var len	= 0;
	
	dul.moveToElementText(node);
	sel.text	= c;
	len			= (dul.text.indexOf(c));
	sel.moveStart('character',-1);
	sel.text	= "";
	
	return len;
}

/* Original function courtesy of http://lists.evolt.org/archive/Week-of-Mon-20030331/138469.html */
// Trim spaces on the left
function ltrim(str)
{
	var s = str.replace(/^(\s)*/, '');
	return s;
}
// Trim spaces on the right
function rtrim(str)
{
	var s = str.replace(/(\s)*$/, '');
	return s;
}