function skryjform(){
       if(document.getElementById){
            elm=document.getElementById('kniha_formular')
            elm.style.display="none";
        }
    }
     

       


     function zobrazokno(e,num, prispevek, kniha)
        {
        	document.delform.delidprispevku.value=prispevek;
        	document.delform.delkniha.value=kniha;
            if (num=='helpokno') kam=0;
            else kam=-200;
            
            if(document.getElementById) // Netscape 6.0+ and Internet Explorer 5.0+
              {
               
               elm=document.getElementById(num)
               if (document.all && !window.opera) {
                  x = event.clientX + document.body.scrollLeft + kam;
                  y = event.clientY + document.body.scrollTop + 20;  
                }  
                else {
                  x = e.pageX + kam;
                  y = e.pageY + 20;   
                 }
                if (document.all && !window.opera) {
                  elm.style.pixelLeft = x;
                  elm.style.pixelTop = y;
                 }
                 else {
                  elm.style.left = x + "px";
                  elm.style.top = y + "px";
                 }
                

               elm.style.display = "block"
              }
           }   

function zavriokno(num){
   if(document.getElementById){
               elm=document.getElementById(num)
      elm.style.display="none";

    }
  } 
  


// IE only - wraps selected text with lft and rgt
  function WrapIE(lft, rgt) {
    strSelection = document.selection.createRange().text;
    if (strSelection!="") {
      document.selection.createRange().text = lft + strSelection + rgt;
    }
  }

// Moz only - wraps selected text with lft and rgt
  function wrapMoz(txtarea, lft, rgt) {
    var selLength = txtarea.textLength;
    var selStart = txtarea.selectionStart;
    var selEnd = txtarea.selectionEnd;
    if (selEnd==1 || selEnd==2) selEnd=selLength;
    var s1 = (txtarea.value).substring(0,selStart);
    var s2 = (txtarea.value).substring(selStart, selEnd)
    var s3 = (txtarea.value).substring(selEnd, selLength);
    txtarea.value = s1 + lft + s2 + rgt + s3;
  }
  
// Chooses technique based on browser
  function wrapTag(txtarea, lft, rgt) {
    lft = unescape(lft);
    rgt = unescape(rgt);
    if (document.all) {
      WrapIE(lft, rgt);
    }
    else if (document.getElementById) {
      wrapMoz(txtarea, lft, rgt);
    }
  }  
  
// IE only - Insert text at caret position or at start of selected text
  function insertIE (txtarea, text) {
    if (txtarea.createTextRange && txtarea.caretPos) { 
      var caretPos = txtarea.caretPos; 
      caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text+caretPos.text + ' ' : text+caretPos.text;
    } else {
      txtarea.value = txtarea.value + text; 
    }
    return;
  } 

// Moz only - Insert text at caret position or at start of selected text
  function insertMoz(txtarea , lft) {
    var rgt="";
    wrapTag(txtarea, lft, rgt);
    return;
  }

// Switch function based on browser - Insert text at caret position or at start of selected text
  function insertTag(txtarea , lft) {
    if (document.all) {
      insertIE(txtarea, lft);
    }
    else if (document.getElementById) {
      insertMoz(txtarea, lft);
    }
  }

// IE only - stores the current cursor position on any textarea activity
  function storeCaret (txtarea) { 
    if (txtarea.createTextRange) { 
      txtarea.caretPos = document.selection.createRange().duplicate();
    } 
  }

function addtext(what)
{
    //document.shoutform.text.value = document.shoutform.text.value + ' ' + what + ' ';
	//document.shoutform.text.focus();
	insertTag (document.ff.text,what);
}