<!--
function changeQuan(n,dg,vText,label)
{
	var tien = 0;
	vText.value = parseInt(vText.value) + n;
	tien = parseInt(label.innerHTML);
	label.innerHTML = parseInt(vText.value)*parseInt(dg);
	tongcong.innerHTML = parseInt(tongcong.innerHTML) - tien + parseInt(label.innerHTML);
}

function onChangeFunc(dg,vText,label)
{
	var tien = 0;
	tien = parseInt(label.innerHTML);
	label.innerHTML = parseInt(vText.value)*parseInt(dg);
	tongcong.innerHTML = parseInt(tongcong.innerHTML) - tien + parseInt(label.innerHTML);
}

function resizeWindow(w,h)
{
	window.resizeTo(w,h);
	
	var height = window.screen.availHeight;
	var width = window.screen.availWidth;
	var left_point = parseInt(width/2)-parseInt(w/2);
	var top_point = parseInt(height/2)-parseInt(h/2);
	window.moveTo(left_point,top_point);
}

function popupWindow(file, x, y,s)
{
	var height = window.screen.availHeight;
	var width = window.screen.availWidth;
	var left_point = parseInt(width/2)-parseInt(x/2);
	var top_point = parseInt(height/2)-parseInt(y/2) - 20;
	popup1=window.open(file,"", "top="+top_point+",left="+left_point+",toolbar=0,location=0,status=0,menubar=0,scrollbars="+s+",resizable=0,width=" + x + ",height=" + y) 
	popup1.focus();
}


function writeDate()
{
	today = new Date(); 

	date = new String(today.getDate());
	if(date.length==1) date="0" +date;
	
	month = new String(today.getMonth()+1);
	if(month.length==1) month="/0"+month;
	else month="/"+month;
	
	year=today.getYear();
	if (year <= 1999) year=1900+year;
	nam="/"+year;
	
	txtDate=date+month+nam;
	return txtDate;
}

function returnNumber(str)
{
	var i=0;
	var strReturn="";
	for(i=str.length-1;i>=0;i--){if(isNaN(str.charAt(i))) break;}
	for(j=i+1;j<str.length;j++) strReturn+=str.charAt(j);
	
	return strReturn;
}

function strTrim(str)
{
	var strReturn = new String("");
	var i=0;
	var j=0;
	
	for(i=0;i<str.length;i++)
	{
		if(str.charCodeAt(i)!=32) break;
	}
	for(j=str.length-1;j>=0;j--) 
	{
		if(str.charCodeAt(j)!=32) break;
	}
		
	for(var n=i;n<=j;n++) strReturn+=str.charAt(n);
	
	return strReturn;
}
-->