/*
Strip whitespace from the beginning and end of a string
Input : a string
*/
function trim(str)
{
return str.replace(/^\s+|\s+$/g,'');
}

/*
Make sure that textBox only contain number
*/
function checkNumber(textBox)
{
while (textBox.value.length > 0 && isNaN(textBox.value)) {
textBox.value = textBox.value.substring(0, textBox.value.length - 1)
}

textBox.value = trim(textBox.value);
/*if (textBox.value.length == 0) {
textBox.value = 0;
} else {
textBox.value = parseInt(textBox.value);
}*/
}

/*
Check if a form element is empty.
If it is display an alert box and focus
on the element
*/
function isEmpty(formElement, message) {
formElement.value = trim(formElement.value);

_isEmpty = false;
if (formElement.value == '') {
_isEmpty = true;
alert(message);
formElement.focus();
}

return _isEmpty;
}

/*
Set one value in combo box as the selected value
*/
function setSelect(listElement, listValue)
{
for (i=0; i < listElement.options.length; i++) {
if (listElement.options[i].value == listValue){
listElement.selectedIndex = i;
}
}
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function checkStock(stock)
{
//                if (isEmpty(stock, 'Please select a size')) {
                if (stock == 0){
			alert ('Veuillez choisir une taille / Please select a size');
		history.go(-1)
//                        return;
                } else {
//                        submit();
 window.location.href = 'index.php?page=cart' + catName;
                }
}