function showMenu(div)
{
	document.getElementById(div).style.visibility = "visible";
}

function hideMenu(div)
{
	document.getElementById(div).style.visibility = "hidden";
}

onload = function() {
document.getElementById('add_content').onmouseup = function() 
{
	if (document.selection) { // for IE
	if(document.selection.createRange().text != null && document.selection.createRange().text !='' )
	{
		var wordToLink = document.selection.createRange().text
		if(wordToLink.length<50)
		{
			var linkToPage = prompt("Podaj adres strony","http://");
			if(linkToPage!='http://' && linkToPage!='' && linkToPage!=null)
			{
				var actualText = document.getElementById('add_content').value;
				var newContent = str_replace(wordToLink,'[url="'+linkToPage+'"]'+wordToLink+'[/url]',actualText);
				document.getElementById('add_content').value = newContent;
			}
		}	
	}
} 
else if (typeof this.selectionStart != 'undefined' ) 
{ // for FF, Opera etc...
	if(this.selectionStart!=this.selectionEnd && this.selectionStart<this.selectionEnd)
	{
		var wordToLink = this.value.substring(this.selectionStart, this.selectionEnd);
		if(wordToLink.length<50)
		{
			var linkToPage = prompt("Podaj adres strony","http://");
			if(linkToPage!='http://' && linkToPage!='' && linkToPage!=null)
			{
				var actualText = document.getElementById('add_content').value;
				var newContent = str_replace(wordToLink,'[url="'+linkToPage+'"]'+wordToLink+'[/url]',actualText);
				document.getElementById('add_content').value = newContent;
			}
		}
	};
};
};
};

function str_replace (search, replace, subject, count) {
    // Replaces all occurrences of search in haystack with replace  
    // 
    // version: 1009.2513
    // discuss at: http://phpjs.org/functions/str_replace    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Gabriel Paderni
    // +   improved by: Philip Peterson
    // +   improved by: Simon Willison (http://simonwillison.net)
    // +    revised by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)    // +   bugfixed by: Anton Ongson
    // +      input by: Onno Marsman
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    tweaked by: Onno Marsman
    // +      input by: Brett Zamir (http://brett-zamir.me)    // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   input by: Oleg Eremeev
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // +   bugfixed by: Oleg Eremeev
    // %          note 1: The count parameter must be passed as a string in order    // %          note 1:  to find a global variable in which the result will be given
    // *     example 1: str_replace(' ', '.', 'Kevin van Zonneveld');
    // *     returns 1: 'Kevin.van.Zonneveld'
    // *     example 2: str_replace(['{name}', 'l'], ['hello', 'm'], '{name}, lars');
    // *     returns 2: 'hemmo, mars'    var i = 0, j = 0, temp = '', repl = '', sl = 0, fl = 0,
            f = [].concat(search),
            r = [].concat(replace),
            s = subject,
            ra = r instanceof Array, sa = s instanceof Array;    s = [].concat(s);
    if (count) {
        this.window[count] = 0;
    }
     for (i=0, sl=s.length; i < sl; i++) {
        if (s[i] === '') {
            continue;
        }
        for (j=0, fl=f.length; j < fl; j++) {            temp = s[i]+'';
            repl = ra ? (r[j] !== undefined ? r[j] : '') : r[0];
            s[i] = (temp).split(f[j]).join(repl);
            if (count && s[i] !== temp) {
                this.window[count] += (temp.length-s[i].length)/f[j].length;}        }
    }
    return sa ? s : s[0];
}

function linkowanie()
{
	var word = getSelText();
	//alert(word);

}