//var inc = document.getElementById("content").innerHTML;
function doChange(i){
	if(i.innerHTML == "Xem tất" || i == "CM")
	{
//		document.getElementById("content").innerHTML = inc;		
		var j;
		for(j=65; j<=90; j++)
		{
			document.getElementById("char" + j).className = "cx1";
		}
		i.className = "cd1";

		var k;
		for(k=1; k<=total; k++)
		{
			var chkid = "c_" + k;
			var spnid = "s_" + k;
			document.getElementById(chkid).style.display = '';								
			document.getElementById(spnid).style.display = '';
		}
		document.getElementById("checkAll").style.display = '';
		//alert(document.getElementById("c64").getAttribute("t"));		
	}
	else if(i.innerHTML == "CCQ")
	{
		document.getElementById("content").innerHTML = document.getElementById("content").innerHTML.replace(/<BR>/i,"");
		var j;
		for(j=65; j<=90; j++)
		{
			document.getElementById("char" + j).className = "cx1";
		}
		document.getElementById("viewAll").className = "cx1";
		i.className = "cd1";
		
		var k;
		for(k=1; k<=total; k++)
		{
			var chkid = "c_" + k;
			var spanid = "s_" + k;
			if(document.getElementById(chkid).getAttribute("t") == 2)
			{
				document.getElementById(chkid).style.display = '';									
				document.getElementById(spanid).style.display = '';
			}
			else
			{
				document.getElementById(chkid).style.display = 'none';									
				document.getElementById(spanid).style.display = 'none';
			}
		}
		document.getElementById("checkAll").style.display = '';
	}
	else
	{	
//		document.getElementById("content").innerHTML = inc;
		var j;
		for(j=65; j<=90; j++)
		{
			document.getElementById("char" + j).className = "cx1";
		}
		document.getElementById("viewAll").className = "cx1";
		i.className = "cd1";
		
		var k;
		for(k=1; k<=total; k++)
		{
			var chkid = "c_" + k;
			var spanid = "s_" + k;
			if(document.getElementById(chkid).getAttribute("t") == 1)
			{
				document.getElementById(chkid).style.display = '';
				document.getElementById(spanid).style.display = '';
				if(document.getElementById(spanid).innerHTML.substring(0,1) == i.innerHTML)
				{
					document.getElementById(chkid).style.display = '';
					document.getElementById(spanid).style.display = '';
				}
				else
				{
					document.getElementById(chkid).style.display = 'none';									
					document.getElementById(spanid).style.display = 'none';
				}
			}
			else
			{
				document.getElementById(chkid).style.display = 'none';									
				document.getElementById(spanid).style.display = 'none';
			}			
		}
		document.getElementById("checkAll").style.display = '';
	}
}

function HideAllCheck()
{
	for(var i=1; i<=total; i++)
	{											
		document.getElementById("c_"+i).style.display='none';
		document.getElementById("s_"+i).style.display='none';
	}
	for(j=65; j<=90; j++){
		document.getElementById("char" + j).className = "cx1";
	}
	document.getElementById("viewAll").className = "cx1";
	document.getElementById("checkAll").style.display='none';										
}

function CheckAllIfVisible()
{
	for (var i=0; i < document.frmSelect.elements.length; i++)
		if (document.frmSelect.elements[i].type=='checkbox')
		{
			if(document.frmSelect.elements[i].style.display == '')
			{													
				document.frmSelect.elements[i].checked = true;
			}
			else
				document.frmSelect.elements[i].checked = false;												
		}
}