function ChangeImg(sImg){document.images["ShowImg"].src=sImg;}
function isEmail(s)
{   
  if (s=="") return false;
  if(s.indexOf(" ")>0) return false;
  if(s.indexOf("@")==-1) return false;
  var i = 1;
  var sLength = s.length;
  if (s.indexOf(".")==-1) return false;
  if (s.indexOf("..")!=-1) return false;
  if (s.indexOf("@")!=s.lastIndexOf("@")) return false;
  if (s.lastIndexOf(".")==s.length-1) return false;
  var str="abcdefghikjlmnopqrstuvwxyz-@._"; 
  for(var j=0;j<s.length;j++)
	if(str.indexOf(s.charAt(j))==-1)
		return false;
   return true;
}
function GoBack(url)
{
	window.location.href=url
}
function OpenViewImgs(form_,obj,folder)
{
	var strUrl="viewimgs.php?form="+form_+"&obj="+obj+"&fder="+folder;
	window.status="Open";
	window.open(strUrl,"View","scrollbars=yes,width=650,height=400");
}
function ViewImage(file)
{
	var strUrl="viewimage.php?f="+file;
	window.status="Open";
	window.open(strUrl,"View","scrollbars=yes,width=500,height=450");
}
function SelectChange(obj)
{if(obj.options[obj.selectedIndex].value != 0) window.location.href=obj.options[obj.selectedIndex].value;}
function CheckDel()
{if (confirm('Bạn chắc chắn muốn xoá không?')){return true;}else{return false;}}

function OpenWin(strUrl,Name,Boder){window.open(strUrl,Name,Boder)}
function unCheck(src,trg){
	document.getElementById(trg).checked=false;
}
function unCheckAll(frm,src,trg){
	for(var i=0;i<frm.elements.length;i++)
		if(frm.elements[i].name==trg && frm.elements[i].type=='checkbox' && frm.elements[i]!=src)
			frm.elements[i].checked=false;
}
function disable(frm,list,state) {
	
	var arr=list.split(',');
	var clr='#ffffff';
	if(state)
		clr='#e0e0e0';
	for(i=0;i<arr.length;i+=1)
		if(frm.elements[arr[i]]){
			frm.elements[arr[i]].disabled=state;
			frm.elements[arr[i]].style.background=clr;
		}
}

function checkChange(field,iRoom){
	if((!isNaN(iRoom)==true)&&iRoom>=0&&iRoom!="")
	{
		field.style.borderColor='#ff4500';
		return true;
	}
	else
	{
		alert('Rooms must be number >0');
		field.value=document.frmListValue.tempStore.value;
		field.focus();
		return false;
	}
}
function isChecked(el,allEl){ 
	var j=0;
	for(var i=0;i<el.length;i+=1)
		if(el[i].checked){
			if(el.value==99)
				j=1000;
			else
				j+=1;
			}
	if(j==0)
		return false;
	else if(j>=el.length-1 && allEl!='') 
		document.getElementById(allEl).checked=true;
	return true;		
}
function getSubAction(ele){
	var sa='update_rooms';
	if(ele.fs.checked)
		sa='open_all';
	else if (ele.close.checked)
		sa='close_all';
	
	else if (!ele.price.disabled)
		sa='update_price';
	return sa;
}
function makeDate(dd,mm,yy) {
	
	if (mm==2 && (yy%4==0&&dd>29 || yy%4>0 && dd>28))	
		return null; 
	else if ((mm==4 || mm==6 || mm==9 || mm==11) && dd==31)
		return null; 		
	return Date.parse(new Date(yy,mm-1,dd));
}