[poorking]

function preventSelection(element){
	var preventSelection = false;
	function removeSelection(){
		if (window.getSelection){
			window.getSelection().removeAllRanges();
		}else if (document.selection && document.selection.clear){
			document.selection.clear();
		}
	}
	function killCtrlA(event){
        if (event.target.tagName.match(/INPUT|TEXTAREA/i)){
			return;
		}
		var key = event.keyCode || event.which;
        if (event.ctrlKey && key == 'A'.charCodeAt(0)){
			removeSelection();
			event.preventDefault();
		}
	}
	Event.add(element, "mousemove", function(){
		if(preventSelection){
			removeSelection();
		}
	});
	Event.add(element, "mousedown", function(e){
		preventSelection = !e.target.tagName.match(/INPUT|TEXTAREA/i);
	});
	Event.add(element, "mouseup", function(){
		if(preventSelection){
			removeSelection();
			preventSelection = false;
		}
	});
	Event.add(element, "keydown", killCtrlA);
	Event.add(element, "keyup", killCtrlA);
}