function disableFnKeys_cancelKey(evt, skipKeyCode) {
    // alert("Sorry, pls don't press #"+(evt.keyCode ? evt.keyCode:evt.which));
    if (evt.preventDefault) {
        evt.preventDefault();
    }
    else {
        if(!skipKeyCode) evt.keyCode = 0;
        evt.returnValue = false;
    }
    return false;
}


function disableFnKeys(evt) {
  if(isIE()) evt = event;
  var key = evt.keyCode;
  var charKeyCode = isIE() ? key:evt.which;
  var charKey = String.fromCharCode(charKeyCode).toLowerCase();

 // Modified by Sandy 2010.11.02 for Safari charKey =t,z   
  var detectSafari = window.navigator.userAgent.indexOf("Safari");
  var detectChrome = window.navigator.userAgent.indexOf("Chrome");
         
  if (evt.ctrlKey) {
      if (charKey=='d') {
        return disableFnKeys_cancelKey(evt);
      }     
      else if (charKey=='r') {
        return disableFnKeys_cancelKey(evt);
      }
      else if (charKey=='h') {
        return disableFnKeys_cancelKey(evt);
      } 
      else if (charKey=='e') {
        return disableFnKeys_cancelKey(evt);
      }
      else if (charKey=='w') {
        return disableFnKeys_cancelKey(evt);
      }  
      else if (charKey=='i') {
        return disableFnKeys_cancelKey(evt);
      } 
      else if (charKey=='o') {
        return disableFnKeys_cancelKey(evt);
      }
      else if (charKey=='l') {
        return disableFnKeys_cancelKey(evt);
      }  
      else if (charKey=='b') {
        return disableFnKeys_cancelKey(evt);
      }
      else if (charKey=='n') {
        return disableFnKeys_cancelKey(evt);
      } 
      else if (charKey=='s') {
        return disableFnKeys_cancelKey(evt);
      } 
      else if (charKey=='u') {
        return disableFnKeys_cancelKey(evt);
      }                      
      else if (charKey=='t') {
        return disableFnKeys_cancelKey(evt);
      }
  }

  if (key==116) { 
  //Modify: by Sandy 2010-11-02 for char 't' for Safari Browser
  
    if (detectSafari == -1 || detectChrome > -1) {
            return true;
        } else { 
        return disableFnKeys_cancelKey(evt);
        }
      }
    //Modify: End
  else if (key==122) { 
  //Modify: by Sandy 2010-11-02 for char 'z' for Safari Browser

        if (detectSafari == -1 || detectChrome > -1) {
            return true;
        } else { 
        return disableFnKeys_cancelKey(evt);
        }
    //Modify: End
  }  
  else if (key==27) {
	return disableFnKeys_cancelKey(evt);
  } 
  else if (key==8) {
    var srcObj;
    if(isIE()) srcObj = evt.srcElement;
    else srcObj = evt.target;
    
    var tagName = srcObj.tagName.toUpperCase();
    if(tagName!="INPUT" && tagName!="TEXTAREA") {
        return disableFnKeys_cancelKey(evt);
    }
  }

  if (evt.altKey) {
	if(charKeyCode!=18) return disableFnKeys_cancelKey(evt, true);
  }
  
  return true;  
}


function handleSpecialField(fd) {
    if(isIE()) {
        if(fd.tagName.toUpperCase()=="INPUT" && fd.type.toUpperCase()=="FILE") {
            if(event.keyCode==27 || event.keyCode==116) {
                event.cancelBubble=true;
                return false;
            }
        }
    }
}


if (isIE()) document.onkeydown = disableFnKeys;
else document.onkeypress = disableFnKeys;



function hideBrowserStatus(){
    window.status='';
    return true;
}

if (document.layers) document.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);

document.onmouseover=hideBrowserStatus;
document.onmouseout=hideBrowserStatus;