$(document).ready(function() 
{
	var d=new Date(); 
	var day =d.getDay();
	var hour =d.getHours();
	var minu =d.getMinutes();
	var cacher=false;
	
	switch(day)
	{
		// dimanche 
		case 0 :
		case 6 :
			cacher=true;
			break; 
			
		case 1: 
		case 2:
		case 3:
		case 4:
			if ( (hour<8) || (hour==8 && minu<45) || (hour==12) || (hour==13 && minu<45) || (hour==17 && minu>45) || (hour>17))
			{
				cacher=true;
			}
		break;
		case 5:
			if ( (hour<8) || (hour==8 && minu<30) || (hour==12) || (hour==13 && minu<30) || (hour>17))
			{
				cacher=true;
			}
		break;
	}
	
	if(cacher)
		$("#item_8453").css('display','none');
});