// JavaScript Document
	function setSelecteds(id,value)
	{
		if(!value || value=='')
			return;
		obj = document.getElementById(id);
		if(obj)
			obj.value = value;
	}

	function validEmail(email) { 
		invalidChars = " /:,;*"
		for ( i=0; i<invalidChars.length; i++ ) 
		{
			badChar = invalidChars.charAt(i)
			if ( email.indexOf(badChar,0)>-1 ) return false
		}

		atPos = email.indexOf("@",1)
		if ( atPos == -1 ) return false
		
		if ( email.indexOf("@",atPos+1)>-1 ) return false
		
		periodPos = email.indexOf(".",atPos)
		if ( periodPos == -1 ) return false
		
		if ( periodPos+3>email.length )	return false
		
		return true
	}
	function check_dn()
	{
		
		if ( document.dn.UserName.value == '' )
		{
			alert("Please choose Username!");
			document.dn.UserName.focus();
			return false;
		}
		if (document.dn.UserName.value.length < 5)
		{
			alert("Please enter at least 5 characters in the \"Username\" field.");
			document.dn.UserName.focus();
			return false;
		}
		if ( document.dn.Password.value == '' )
		{
			alert("Please choose Password !");
			document.dn.Password.focus();
			return false;
		}
		if (document.dn.Password.value.length < 6)
		{
			alert("Please enter at least 5 characters in the \"Password\" field.");
			document.dn.Password.focus();
			return false;
		}

		if ( document.dn.ConPass.value == '' )
		{
			alert("Please choose Confirm Password !");
			document.dn.ConPass.focus();
			return false;
		}
		if (document.dn.ConPass.value.length < 6)
		{
			alert("Please enter at least 5 characters in the \"Password\" field.");
			document.dn.ConPass.focus();
			return false;
		}

		if (document.dn.ConPass.value != document.dn.Password.value)
		{
			alert("Your passwords do not match. Please type more carefully !");
			document.dn.ConPass.focus();
			return false;
		}

		if ( document.dn.Email.value == '' )
		{
			alert("Email is not empty !");
			document.dn.Email.focus();
			return false;
		}

		if (document.dn.Email.value != '')
			if ( !validEmail(document.dn.Email.value) ) 
			{
				alert("Email is incorrect! Ex: email@domainname.com");
				document.dn.Email.focus();
				document.dn.Email.select();
				return false;
			}
		if ( document.dn.dn_name.value == '' )
		{
			alert("Nhap vao ten doanh nghiep !");
			document.dn.dn_name.focus();
			return false;
		}	
		
		if ( document.dn.dn_address.value == '')
		{
			alert("Nhap vao dia chi !");
			document.dn.dn_address.focus();
			return false;
		}
		
		if ( document.dn.Khuvuc.value == 0)
		{
			alert("Chon Tinh/Tp !");
			document.dn.Khuvuc.focus();
			return false;
		}
		if ( document.dn.Quan.value == 0)
		{
			alert("Chon Quan/Huyen !");
			document.dn.Quan.focus();
			return false;
		}
		if ( document.dn.dn_phone.value == '')
		{
			alert("Nhap vao dien thoai !");
			document.dn.Khuvuc.focus();
			return false;
		}
		if ( document.dn.dn_vondk.value == '')
		{
			alert("Nhap vao von dang ky !");
			document.dn.dn_vondk.focus();
			return false;
		}
		if ( document.dn.hinhxacnhan.value == "" )
		{
			alert("Thong tin xac nhan khong duoc rong !");
			document.dn.hinhxacnhan.focus();
			return false;
		}
		if (document.dn.hinhkiemtra.value != document.dn.keys_check.value )
		{
			alert("Thong tin xac nhan phai trung voi noi dung cua hinh anh hien thi !");
			document.dn.hinhxacnhan.focus();
			return false;
		}
		return true;
	}

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