function edit(idsl){
var slx = document.getElementById("upd"+idsl);
slx.innerHTML="Cập nhật";
}

function updatesl(idsl){

var ids = document.getElementById("idpr"+idsl).value;
var sls = document.getElementById("sl"+idsl).value;
var numberx = /^[0-9]+(([0-9])?[0-9]*)*$/;
if((sls > 0) && sls.match(numberx)){
window.location.href="Cart?rep=updateqtt&id="+ids+"&qtt="+sls;}
else {
var slx = document.getElementById("upd"+idsl);
slx.innerHTML="<img border='0' width='25' height='25' id='qtter' src='./images/error_cart.gif'>";
inlineMsg('qtter','Nhập số lượng không đúng',2);
return false;
}
}




//START OF MESSAGE SCRIPT //

var MSGTIMER = 20;
var MSGSPEED = 5;
var MSGOFFSET = 3;
var MSGHIDE = 3;

//build out the divs, set attributes and call the fade function //
function inlineMsg(target,string,autohide) {
var msg;
var msgcontent;
if(!document.getElementById('msg')) {
 msg = document.createElement('div');
 msg.id = 'msg';
 msgcontent = document.createElement('div');
 msgcontent.id = 'msgcontent';
 document.body.appendChild(msg);
 msg.appendChild(msgcontent);
 msg.style.filter = 'alpha(opacity=0)';
 msg.style.opacity = 0;
 msg.alpha = 0;
} else {
 msg = document.getElementById('msg');
 msgcontent = document.getElementById('msgcontent');
}
msgcontent.innerHTML = string;
msg.style.display = 'block';
var msgheight = msg.offsetHeight;
var targetdiv = document.getElementById(target);
targetdiv.focus();
var targetheight = targetdiv.offsetHeight;
var targetwidth = targetdiv.offsetWidth;
var topposition = topPosition(targetdiv) - ((msgheight - targetheight) / 2);
var leftposition = leftPosition(targetdiv) + targetwidth + MSGOFFSET;
msg.style.top = topposition + 'px';
msg.style.left = leftposition + 'px';
clearInterval(msg.timer);
msg.timer = setInterval("fadeMsg(1)", MSGTIMER);
if(!autohide) {
 autohide = MSGHIDE;  
}
window.setTimeout("hideMsg()", (autohide * 1000));
}

//hide the form alert //
function hideMsg(msg) {
var msg = document.getElementById('msg');
if(!msg.timer) {
 msg.timer = setInterval("fadeMsg(0)", MSGTIMER);
}
}

//face the message box //
function fadeMsg(flag) {
if(flag == null) {
 flag = 1;
}
var msg = document.getElementById('msg');
var value;
if(flag == 1) {
 value = msg.alpha + MSGSPEED;
} else {
 value = msg.alpha - MSGSPEED;
}
msg.alpha = value;
msg.style.opacity = (value / 100);
msg.style.filter = 'alpha(opacity=' + value + ')';
if(value >= 99) {
 clearInterval(msg.timer);
 msg.timer = null;
} else if(value <= 1) {
 msg.style.display = "none";
 clearInterval(msg.timer);
}
}

//calculate the position of the element in relation to the left of the browser //
function leftPosition(target) {
var left = 0;
if(target.offsetParent) {
 while(1) {
   left += target.offsetLeft;
   if(!target.offsetParent) {
     break;
   }
   target = target.offsetParent;
 }
} else if(target.x) {
 left += target.x;
}
return left;
}

//calculate the position of the element in relation to the top of the browser window //
function topPosition(target) {
var top = 0;
if(target.offsetParent) {
 while(1) {
   top += target.offsetTop;
   if(!target.offsetParent) {
     break;
   }
   target = target.offsetParent;
 }
} else if(target.y) {
 top += target.y;
}
return top;
}

//preload the arrow //
if(document.images) {
arrow = new Image(7,80); 
arrow.src = "images/msg_arrow.gif"; 
}
