function DoChanges(num, count){
		for (i=0; i <= count; i++)
			{
			var mytab = "tab" + i;
			var box = "box" + i;
			if (i == num) {
				if (document.getElementById(box) != null) document.getElementById(box).style.visibility = 'visible';
				if (document.getElementById(mytab) != null) document.getElementById(mytab).className = "thistab";
			}else{
				if (document.getElementById(box) != null) document.getElementById(box).style.visibility = 'hidden';
				if (document.getElementById(mytab) != null) document.getElementById(mytab).className = "tab";
			}
		}
	}