function Sorry(){
		alert("Chuc nang nay chua cai dat. Xin ban quay lai sau.");
	}
	function CancelBubble(){
		if(document.all) window.event.cancelBubble = true;
	}
	function Trim(s){
	  while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r')){
	    s = s.substring(1,s.length);
	  }
	  while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r')){
	    s = s.substring(0,s.length-1);
	  }
	  return s;
	}
	function ThayThe(str,KyTu){
		while (str.indexOf(KyTu)>=0){
			str = str.replace(KyTu,"");	
		} 
		return str;
	}	
	function ChuanXau(str){
		strChuan = str;
		strChuan = ThayThe(strChuan,"'");
		strChuan = ThayThe(strChuan,"--");		
		strChuan = Trim(strChuan);
		return strChuan;		
	}
	//Chuan xau mo rong
	function ChuanXau_Ex(str){
		strChuan = str;
		strChuan = ThayThe(strChuan,"'");
		strChuan = ThayThe(strChuan,"--");		
		strChuan = Trim(strChuan);
		return strChuan;
	}
	function ChuanXauNoiDung(str){
		strChuan = str;
		strChuan = ThayThe(strChuan," ");
		strChuan = ThayThe(strChuan," ");
		if(strChuan=="") strChuan="<p></p>";
		return strChuan;
	}
	function CheckFileImg(FileName){
		var dotpos;
		FileName = FileName.substring(FileName.lastIndexOf("\\")+1,FileName.length);
		dotpos = FileName.lastIndexOf('.');
		ext = FileName.substr(dotpos+1,FileName.length-dotpos);
		ext = ext.toLowerCase();	
		if (ext != ""){
			if (ext != "gif" && ext != "jpg" && ext != "bmp") {
				return false;					
			}else{
				return true;
			}
		}else{
			return true;
		}
	}
		function CheckFile(FileName){
		var dotpos;
		FileName = FileName.substring(FileName.lastIndexOf("\\")+1,FileName.length);
		dotpos = FileName.lastIndexOf('.');
		ext = FileName.substr(dotpos+1,FileName.length-dotpos);
		ext = ext.toLowerCase();	
		if (ext != ""){
			if (ext != "htm" && ext != "html" && ext != "doc") {
				return false;					
			}else{
				return true;
			}
		}else{
			return true;
		}
	}
	// So sanh ngay bat dau va ngay ket thuc
	// Goi:
	// if (CompDate(document.frmForm.txtDateStart.value,document.frmForm.txtDateEnd.value)){
	// 		alert("Ngay bat dau lon hon ngay ket thuc!");
	//		return false;
	// }
	function CompDate(strDate1,strDate2){
		var m1, d1, y1;
		var m2, d2, y2;
		var s, pos1, pos2;
		var s = strDate1, s1 = strDate2;
		if (s.length == 0 || s1.length == 0) return true;
		// Cat ngay bat dau
		pos1 = s.indexOf("/",0);
		pos2 = s.indexOf("/",pos1+1);
		d1 = parseInt(s.substr(0,pos1),10);
		m1 = parseInt(s.substr(pos1+1,pos2-pos1-1),10);
		y1 = parseInt(s.substr(pos2+1,s.length-pos2),10);
		
		// Cat ngay ket thuc
		pos1 = s1.indexOf("/",0);
		pos2 = s1.indexOf("/",pos1+1);
		d2 = parseInt(s1.substr(0,pos1),10);
		m2 = parseInt(s1.substr(pos1+1,pos2-pos1-1),10);
		y2 = parseInt(s1.substr(pos2+1,s1.length-pos2),10);
		
		var d1 = new Date(y1,m1,d1); // Dinh dang lai ngay bat dau
		var d2 = new Date(y2,m2,d2); // Dinh dang lai ngay ket thuc
		if (d1 > d2) 
			return true;
		else
			return false;
	}
	//<a ... onclick = "javascript: ViewImg('','','');">...</a>
	function ViewImg(strCommon,Path,wimg,himg){
		//alert(strCommon+Path);
		var w1,h1;
		w1 = 750;
		h1 = 480;
		w = parseInt(wimg);
		h = parseInt(himg);
		if (w <= 750){
			w1 = w;
		}
		if (h <= 480){
			h1 = h;
		}
		w1 += 58;
		h1 += 48;
		var strTop = parseInt((screen.height - h1)/2)-20;
		var strLeft = parseInt((screen.width - w1)/2);
		args = "width=" + w1 + "px,height=" + h1 + "px,top=" + strTop + "px,left=" + strLeft + "px,resizable=0,status=0,scrollbars=";
		if ((wimg>=750)||(himg>=480)){
			args += "1";
		}else{
			args += "0";
		}				
		url = strCommon+"/ViewImg.asp?Path=" + Path + "&Height=" + himg + "&Width=" +wimg;				
		window.open(url,"ViewImages",args);
		window.event.returnValue = false;
	}
	//<a ... onclick = "javascript: ViewImg('','','','');">...</a>
	function ViewImgDetail(Path,wimg,himg,strMa){
		var w1,h1
		w1 = 650;
		h1 = 500;
		w = parseInt(wimg);
		h = parseInt(himg);
		if (w <= 630) w1 = w;
		if (h <= 580) h1 = h;
		w1 += 48;
		h1 += 30;
		var strTop = parseInt((screen.height - h1)/2)-20;
		var strLeft = parseInt((screen.width - w1)/2);
		args = "width=" + w1 + "px,height=" + h1 + "px,top=" + strTop + "px,left=" + strLeft + "px,resizable=no,scrollbars=yes,status=0";
		url = "ViewImage.asp?Path=" + Path + "&Height=" + himg + "&Width=" + wimg + "&Ma=" + strMa;
		window.open(url,"test",args);
	}