function isIE() { //檢查瀏覽器是否為IE
  if (window.navigator.userAgent.toLowerCase().indexOf("msie") >= 1)
    return true;
  else
    return false;
}

if(!isIE()){ //若瀏覽器不是IE則重新定義innerText讓瀏覽器能支援
	HTMLElement.prototype.__defineGetter__( "innerText",
		function(){
			var anyString = "";
			var childS = this.childNodes;
			for(var i=0; i <childS.length; i++) {
			if(childS[i].nodeType==1)
				anyString += childS[i].tagName=="BR" ? '\n' : childS[i].innerText;
			else if(childS[i].nodeType==3)
				anyString += childS[i].nodeValue;
			}
			return anyString;
		}
	);
	HTMLElement.prototype.__defineSetter__( "innerText",
		function(sText){
			this.textContent=sText;
		}
	);
}

//刪除前後空白字元
function trim(str) {
	return str.replace(/^\s+|\s+$/g, "");
}

//簡易email check
function checkEmail(fieldName) {
	if ((fieldName.length < 7) || (fieldName.indexOf('@') < 1) || (fieldName.indexOf('.') < 1) 
		|| ((fieldName.length - fieldName.lastIndexOf('.')) < 3)) {
		return false; // can't be valid!
	}
	return true;
}

//checkbox,radio檢查
function multiChoiceFunc(elms,n) {
	for (i=0;i<n;i++) {
		if (elms[i].checked) break;
		if (i==n-1) return false;
	}
	return true;
}

//dropdownlist檢查
function multiSelectFunc(elms,n) {
	for (i=0;i<n;i++) {
		if (elms[i].selected && elms[i].value !="") break;
		if (i==n-1) return false;
	}
	return true;
}

//判斷為數字
function isdigit(s) {
	var r,re;
	re = /\d*/i; //\d表示數字,*表示匹配多個數字
	r = s.match(re);
	return (r==s)?1:0;
}

function isBrowserSupportAJAX() 
{
	if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("MsXml2.XMLHttp");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHttp");
			} catch (e) {}
		}
	} else if (window.XMLHttpRequest) {	// firefox、mozilla...
		http_request = new XMLHttpRequest();
		http_request.overrideMimeType('text/xml');
	}
	
	if (!http_request) {
		alert('您的瀏覽器不支援！');
		return false;
	}
}

function checkTextContent(elms,max,remain) {
	if (elms.value.length > max) {
		elms.value = elms.value.substring(0,max);
		remain.value = 0;
		alert("內容不能超過 "+max+" 個字!");
	} else {
		remain.value = max - elms.value.length;
  }
}

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_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_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_showHideLayers() { //v9.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) 
  with (document) if (getElementById && ((obj=getElementById(args[i]))!=null)) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}