function validate_form(fname,chk)
			{ 
				var ckval=0;
				for (i = 0; i < fname.length; i++)
					{
						if(fname[i].checked == true)
						ckval=1;
					}
				if(ckval==0)
				{
					if(chk==1)
					{alert('Please select a product');}
					else
					{alert('Please select an accessory');}
					return false;
				}
			}