function TableBgLock(Obj){
	if(!Obj.checked){
		Obj.style.backgroundColor='';
	}else{
		Obj.style.backgroundColor='#F0F0F0';
	}
}
var chkall = false;
function CheckAll(form) {
    chkall = !chkall;
	for (var i=0;i<form.elements.length;i++) {
		var e = form.elements[i];
		if (e.type=='checkbox')
			e.checked = chkall;
	}
}
function RevCheck(form) {
	for (var i=0;i<form.elements.length;i++) {
		var e = form.elements[i];
		if (e.type=='checkbox')
			e.checked = !e.checked;
		if (chkall&&!e.checked) chkall=false;
	}
}
function UnCheckAll(form) {
	for (var i=0;i<form.elements.length;i++) {
		var e = form.elements[i];
		if (e.type=='checkbox')
			e.checked = false;
	}
	chkall=false;
}