function preventSelection(element){var preventSelection=false;function addHandler(element,event,handler){if(element.attachEvent)
element.attachEvent('on'+event,handler);else
if(element.addEventListener)
element.addEventListener(event,handler,false);}
function removeSelection(){if(window.getSelection){window.getSelection().removeAllRanges();}
else if(document.selection&&document.selection.clear)
document.selection.clear();}
function killCtrlA(event){var event=event||window.event;var sender=event.target||event.srcElement;if(sender.tagName.match(/INPUT|TEXTAREA/i))
return;var key=event.keyCode||event.which;if(event.ctrlKey&&key=='A'.charCodeAt(0))
{removeSelection();if(event.preventDefault)
event.preventDefault();else
event.returnValue=false;}}
addHandler(element,'mousemove',function(){if(preventSelection)
removeSelection();});addHandler(element,'mousedown',function(event){var event=event||window.event;var sender=event.target||event.srcElement;preventSelection=!sender.tagName.match(/INPUT|TEXTAREA/i);});addHandler(element,'mouseup',function(){if(preventSelection)
removeSelection();preventSelection=false;});addHandler(element,'keydown',killCtrlA);addHandler(element,'keyup',killCtrlA);}
preventSelection(document);