function setList(tinh){
	var str;
	switch (tinh){
		case "ANGIANG":
			str=dn.ag.value;
			break;
		case "BACLIEU":
			str=dn.bl.value;
			break;
		case "BENTRE":
			str=dn.bt.value;
			break;
		case "CAMAU":
			str=dn.cm.value;
			break;
		case "CANTHO":
			str=dn.ct.value;
			break;
		case "DONGTHAP":
			str=dn.dt.value;
			break;
		case "HAUGIANG":
			str=dn.hg.value;
			break;
		case "KIENGIANG":
			str=dn.kg.value;
			break;
		case "LONGAN":
			str=dn.la.value;
			break;
		case "SOCTRANG":
			str=dn.st.value;
			break;
		case "TIENGIANG":
			str=dn.tg.value;
			break;
		case "TRAVINH":
			str=dn.tv.value;
			break;
		case "VINHLONG":
			str=dn.vl.value;
			break;	
		case "TATCA":
			str="TATCA";
			break;								
	}
	 if (str!="TATCA"){
	 	dn.lhuyen.disabled=false;
	 	addList(document.dn.lhuyen,str);
	 }
	 else{
	 	// str=dn.ct.value;
	 	addList(document.dn.lhuyen,str);
	 	dn.lhuyen.disabled=true;	 
	 }						
}


function countPlus(tb,tname){
		var tbe=eval(tb);
		var st=tbe.value;	
		var str=tbe.value;
		var i=st.indexOf("+");
		var j=str.lastIndexOf("+");
		
		if ((i!=j)&& (i !=-1)){
		 	alert("Chi cho phep tim dong thoi 2 " + tname + "\n Vui long xac dinh lai!");
		 	tbe.focus();
		 	return false;	
		} 
	return true;			
		
}





function checkFrm(frm){
	
	if (dn.lhuyen.disabled){		
		dn.hn.value="TATCA"
	}
	
	if (dn.thop.checked){		
		dn.th.value="Y"
	}
	else{
		dn.th.value="N"
	}

	/*

	if (dn.hvn(0).checked){		
		dn.hv.value="Y"
	}
	else{
		if (dn.hvn(1).checked){		
			dn.hv.value="N"
		}
		
		else{
		    dn.hv.value="T"
		}
	}
	*/

	//alert("HV=" + dn.hv.value)


	if (dn.tendn.value.length !=0){		
		dn.tendn.value=splitSpace(dn.tendn.value)
	}	
	if (dn.nguoidd.value.length !=0){		
		dn.nguoidd.value=splitSpace(dn.nguoidd.value)
	}
	if (dn.linhvuc.value.length !=0){		
		dn.linhvuc.value=splitSpace(dn.linhvuc.value)
	}

	/*
	if (dn.thitruong.value.length !=0){		
		dn.thitruong.value=splitSpace(dn.thitruong.value)
	}
	if (dn.sanpham.value.length !=0){		
		dn.sanpham.value=splitSpace(dn.sanpham.value)
	}
	*/
	
	if (dn.tendn.value.length==0 && dn.linhvuc.value.length==0 &&  dn.nguoidd.value.length==0 && 		
		dn.ltinh.value=="TATCA" && dn.lloaihinh.value=="TATCA"  ){	
		
		alert("Can xac dinh chi tieu tim kiem!");
		dn.tendn.focus();	
		return false;
	}
	

	if (dn.tendn.value.length==0 && dn.linhvuc.value.length==0 &&  dn.nguoidd.value.length==0 && 		
		dn.ltinh.value=="TATCA" && dn.lloaihinh.value=="DNTN"  ){	
		
		alert("Chon Tinh\/Thanh gioi han tim kiem!");
		dn.ltinh.focus();	
		return false;
	}	

	var tf=countPlus(dn.tendn,"Ten DN.");
	if (!tf) return false;

	var tf1=countPlus(dn.nguoidd,"Nguoi dai dien.");
	if (!tf1) return false;

	var tf2=countPlus(dn.linhvuc,"Linh vuc.");
	if (!tf2) return false;

	return true
}


	function checkNum(frm,tbx){
		var num=tbx.value;
		var validChars="0123456789";	// chi chua so				
		var index=0;		
		// search for index of element		
		for (var i=0;i<parseInt(frm.elements.length);i++){					
			if(frm.elements[i].name==tbx.name){														
				index=i;						
				break;
			}//if 															
		}// for i
		
		for (var i=0;i<num.length;i++){
			var inchar=num.charAt(i);		
			if (validChars.indexOf(inchar,0) == -1){			
				alert("Vui long nhap so!");	
				frm.elements[index].focus();
				frm.elements[index].select();							
				return false;			
			}	
	
		}		
	}