function disableCtrlKeyCombination(e)
{
	//list all CTRL + key combinations you want to disable
	var forbiddenKeys = new Array('v');
	var key;
	var isCtrl;

	if(window.event)
	{
			key = window.event.keyCode;     //IE
			if(window.event.ctrlKey)
					isCtrl = true;
			else
					isCtrl = false;
	}
	else
	{
			key = e.which;     //firefox
			if(e.ctrlKey)
					isCtrl = true;
			else
					isCtrl = false;
	}

	//if ctrl is pressed check if other key is in forbidenKeys array
	if(isCtrl)
	{
			for(i=0; i<forbiddenKeys .length; i++)
			{
					//case-insensitive comparation
					if(forbiddenKeys[i].toLowerCase() == String.fromCharCode(key).toLowerCase())
					{
							return false;
					}
			}
	}
	return true;
}