function lostFocus(el, txt){
	if(el.value == "")
		el.value = txt;
}
function gainFocus(el, txt){
	if(el.value == txt)
		el.value = "";
}
$(document).ready(function(){
	$('.assistent').click(function(e){
		e.preventDefault();
		var url = $(this).attr('href');
		window.open(url,'','fullscreen=0,width=600,height=570,location=0');
	});
});