function bbcode(u,v){
	try {
		if (document.selection){
			var str = document.selection.createRange().text;
			document.forms['form1'].elements['text'].focus();
			var sel = document.selection.createRange();
			sel.text = u + str + v;
			document.forms['form1'].elements['text'].focus();
			return;
		}
		else if ((typeof
			document.forms['form1'].elements['text'].selectionStart) !='undefined') {
			var txtarea = document.forms['form1'].elements['text'];
			var selLength = txtarea.textLength;
			var selStart = txtarea.selectionStart;
			var selEnd = txtarea.selectionEnd;
			var s1 = (txtarea.value).substring(0,selStart);
			var s2 = (txtarea.value).substring(selStart, selEnd)
			var s3 = (txtarea.value).substring(selEnd, selLength);
			txtarea.value = s1 + u + s2 + v + s3;
			txtarea.selectionStart = s1.length;
			txtarea.selectionEnd = s1.length + u.length + s2.length + v.length;
			document.forms['form1'].elements['text'].focus();
			return;
		}
		else {

		}
	}
	catch(e){
	}
}



function maxLength(f,maximum){
   if (f.value.length > maximum){
      alert("Max " + maximum + " ! ");
      f.value = f.value.substr(0,maximum);
	  }   
a=f.value.length
b=maximum;
c=b-a;
document.form1["znak"].value=c; 
}