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 MM_openBrWindow(theURL,winName,features) {
  window.open(theURL,winName,features);
}

function reloadOpenerPage(story_id){
	window.opener.location.reload();
	window.opener.location = window.opener.location+'comment'+story_id;
	self.close();
}

function checkCommentAddPostForm(item_no) {
	var comment_html = document.getElementById("wysiwyg" + "textarea1").contentWindow.document.body.innerHTML;
	comment = trim(comment_html);
	comment = comment.replace(/&lt;/gi, "<")
	comment = comment.replace(/&gt;/gi, ">")
	comment = comment.replace(/&amp;/gi, "&")
	comment = comment.replace(/&nbsp;/gi, "")
	comment = comment.replace(/(<([^>]+)>)/gi, "") // remove html tag
	
	if (comment == "" && item_no != 2) {
		alert("請 輸 入 留 言 ");
		return;
	}else if (isEmpty(window.document.frmAddComment.visualconfirm, '請 輸 入 確 認 碼')) {
		return;
	}else {
		document.getElementById("hidden_var").value = comment_html;
		window.document.frmAddComment.submit();
	}
}

function x_checkCommentAddPostForm() {
    with (window.document.frmAddComment) {
		if (isEmpty(txtComment, '請 輸 入 留 言')) {
			return;
		} else if (isEmpty(visualconfirm, '請 輸 入 確 認 碼')) {
			return;
		} else {
			submit();
		}
	}
}