//Hàm CheckDataInput: kiểm tra 1 control có bằng stringcheck hay chưa & đưa ra thông báo cụ thể (stringalert).
	function CheckDataInput(controlid, stringcheck, stringalert)
	{
		
		if (document.getElementById(controlid).value == stringcheck)
		{
			alert(stringalert)
  			document.getElementById(controlid).focus();		
			return "true";	
		}
		else
		{
			return "false";
		}
	}
	
	///////Email_Check : Ham Kiem tra tinh hop le cua email ///////////////////////////////////////////////	
	function Email_Check(name)
	{
		flag=0;
		Evalue=name.value;
		sign=Evalue.indexOf("@");
		
		if (Evalue!= "" && sign==-1)
			{flag=1;}
		else 
			if(Evalue.indexOf(" ") != -1)
				{flag=1;} 
		
		return flag;
		name.focus();
	}			
	///////validate : Ham Kiem tra tinh hop le cua ngay (theo Tieng Anh / Tieng Viet) ///////////////////////////////////////////////	
	var check;
	var m_date_todatabase;
	function validate(date,Msg)
	{
		
		check=true;
		vardate = date.value;
		var d = vardate.split("/");
		vardate = d[1] + "/";
		vardate += d[0] + "/";
		vardate += d[2];		
		m_date_todatabase = vardate;
		len = vardate.length;
		pos1 = vardate.indexOf("/");
		m2 = vardate.substring(0,pos1);
		pos2 = vardate.indexOf("/",pos1+1);
		d2=vardate.substring(pos1+1,pos2);
		y2=vardate.substring(pos2+1,len);
	
		if(y2<1900)
			check=false;
		if (d2=="" || m2=="" || y2==""||d2=="0"||m2=="0")
				check=false;	  	
		if (m2.length>2 || d2.length>2 || (y2.length!=4 && y2.length!=2))
			{check=false;}	  	
			numAddr3=escape(m2);
			numAddr2=escape(d2);
			numAddr1=escape(y2);
			if (numAddr2>31 || numAddr3>12)
				{
				check=false;
				}
			if (!check)
			{
				alert (Msg);
				return false;
			}
	}
	/* Cach goi ham:
			validate(document.Form1.PanelCenter1_NEWSDATE,"Vui long chon ngay dang tin hop le.")
			if (!check)
			{
				document.Form1.PanelCenter1_NEWSDATE.focus();
				return false;
			}
	*/
	
	////Ham FormatDate_EN_VN ben duoi dung de chuyen doi dang ngay mm/dd/yyyy hoac nguoc lai////////////////
	function FormatDate_EN_VN_EN(date)
	{									 
		var d = date.split("/");
		vardate = d[1] + "/";
		vardate += d[0] + "/";
		vardate += d[2];			
		return vardate;
	}
	
	
  
  
  
  
	////Ham CheckNumber dung de kiem tra nhap so (Int) /////////////////////////
	function CheckNumber_Int(controlid, stringalert)
	{
		
		if (isNaN(document.getElementById(controlid).value))
		{
			alert(stringalert)
  			document.getElementById(controlid).focus();		
			return "true";	
		}
		else
		{
			return "false";
		}
	}