function GetXmlHttpObject(handler)
{
  var objXMLHttp=null
  if (window.XMLHttpRequest)
  {
      objXMLHttp=new XMLHttpRequest()
  }
  else if (window.ActiveXObject)
  {
      objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
  }
  return objXMLHttp
}

/**
kiem tra load anh - biennv
**/
 function checkloadimage(divid){
 document.getElementById(divid).style.display='none';
 }
 /**
 click vao nut search
 **/
function clicksearch(){
	var key=document.getElementById("key").value;
	window.location.href=base_url+'index.php/web/index/0/'+encodeURIComponent(key);
}
// lay ket qua cua cac seclet

function getValueSelect(name)
{
	var value=1;
	var rad=document.getElementsByName(name);
	for (i=0;i<rad.length;i++)
	{
	if (rad[i].selected==true)
	value= rad[i].value;
	}
	return value;
 }
function viewday(url){
	
	var day = document.searchtime.day.value;
	var mon = document.searchtime.months.value;
	var year = document.searchtime.year.value;
	if((day=="")||(day==null)) day =1;
	if((mon=="")||(mon==null)) mon =1;
	if((year=="")||(year==null)) year =2009;
	window.location.href=url+'/'+day+'-'+mon+'-'+year;
	return false;
}
//Gửi mail
function sendComment(){
	var title=document.getElementById("title").value;
	var content=document.getElementById("content").value;
	var email=document.getElementById("email").value;
	var sender=document.getElementById("sender").value;
	var link=document.getElementById("link").value;
	if(title==''){
		alert('Bạn chưa nhập tiêu đề.');
		document.getElementById("title").focus();
		return;
	}
	if(sender==''){
		alert('Bạn chưa nhập tên người gửi.');
		document.getElementById("sender").focus();
		return;
	}
	if(!isEmail(email)){
		alert('Email không hợp lệ.');
		document.getElementById("email").focus();
		return;
	}
	var parameters="title="+title+"&content="+content+"&email="+email+"&sender="+sender+"&link="+link;
	var url=base_url+'news/sendmail';
  xmlHttpcomment=GetXmlHttpObject()
  if (xmlHttpcomment==null)
  {
      alert ("Browser does not support HTTP Request");
      return;
  }
  xmlHttpcomment.onreadystatechange=function()
  {
  		 if (xmlHttpcomment.readyState==4 || xmlHttpcomment.readyState=="complete"){ 

          document.getElementById('result').innerHTML=xmlHttpcomment.responseText;
  		}else {
        document.getElementById('result').innerHTML = "<img class=\"loading\" src=\""+base_url+"public/img/mainload.gif\" />" ;
 		}
 }
	xmlHttpcomment.open("POST",url,true) ;
	xmlHttpcomment.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttpcomment.setRequestHeader("Content-length", parameters.length);
	xmlHttpcomment.setRequestHeader("Connection", "close");
	xmlHttpcomment.send(parameters);
	document.getElementById("title").value='';
	document.getElementById("content").value='';
	document.getElementById("email").value='';
	document.getElementById("sender").value='';
}
/**
click vao send mail
**/
function clicksend(){
	var state=document.getElementById('sendmail').style.display;
	if(state=='none'){
		state=document.getElementById('sendmail').style.display='block';
	}
	else{
		state=document.getElementById('sendmail').style.display='none';
	}
}
function isEmail(email)
{
 //alert("email: "+email);
	if(email=='')
	return false;
	if(email.indexOf('')>0)
	return false;
	if(email.indexOf('@')==-1)
	return false;
	var i=1;
	var sLength=email.length;
	if(email.indexOf('.')==-1)
	return false;
	if(email.indexOf('..')!=-1)
	return false;
	if(email.indexOf('@')!=email.lastIndexOf('@'))
	return false;
	if(email.lastIndexOf('.')==email.length-1)
	return false;
	var str = 'aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ1234567890-@._';
	for(var j=0;j<email.length;j++)
	if(str.indexOf(email.charAt(j))==-1)
	return false;
	return true;
}
/**
	ham load ajax cho tin lien quan cua tin chi tiet
**/
function loadconcern(id,cateID){
    url= base_url + 'news/concern/'+id+'/'+cateID;
  	xmlHttp1=GetXmlHttpObject()
  	if (xmlHttp1==null)	{
      alert ("Browser does not support HTTP Request");
      return;
  	}
  xmlHttp1.onreadystatechange=function(){
	  	if (xmlHttp1.readyState==4 || xmlHttp1.readyState=="complete") {    
	          document.getElementById("same_list").innerHTML=xmlHttp1.responseText;
	          
	  	} else {
	            document.getElementById("same_list").innerHTML='Đang load tin liên quan...';            
	  	}
  }
  		xmlHttp1.open("GET",url,true) ;
  		xmlHttp1.send(null);
}