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) { //v4.0
  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 && document.getElementById) x=document.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 checkEmpty(text){	
	if (text == ""){
		return true;
	}
	else{
		return false;
	}
}

function checkNumeric(text){
	if (text != ""){
		var numObj = new Number(text);
		return !isNaN(numObj);
	}
	else{
		return false;
	}
}

function checkValidEmail(text){
	atPos=text.indexOf("@")
	dotPos=text.lastIndexOf(".")
	
	if (atPos<1 || dotPos-atPos<2) 
		return false;
	else
		return true;
}

function checkRadio(radioName){
	if (radioName != null){
	
	}
	else{
		return false;
	}
}

function openerReload(){
	if (!window.opener.closed){
		window.opener.reloadPage();	
	}	
}

function reloadPage(){
	window.location.reload();
}

function closeWindow(){
	window.close();
}

function openerSubmitPage(){	
	if (!window.opener.closed){
		window.opener.submitPage();
	}
}

function submitPage(){
	document.forms[0].submit();
}

function redirect(link){
	document.location = link;
}

function checkAllItem(thisItem, targetItemList){
	var status = thisItem.checked;
	var checkItem = targetItemList;

	if (checkItem != null){
		if (checkItem.length > 1){
			for (i = 0; i < checkItem.length; i++){
				checkItem[i].checked = status;
			}
		}
		else{
			checkItem.checked = status;
		}
	}
}

function setCursor(curItem, cursorType){
	curItem.style.cursor = cursorType;
}

function setVisible(curItem, isVisible){
	if (curItem.style.visibility != null){
		curItem.style.visibility = isVisible;
	}
}

function showNewWindow(url, height, width){
	var specs = "height=" + height + ", width=" + width + ", menubar=no, status=yes, titlebar=no, toolbar=no, scrollbars=yes, resizable=yes";																																			
	window.open(url, "", specs);
}

function showPopUp(url){
	showNewWindow(url, 500, 500);
}

function showCoursePopUp(url){
	showNewWindow(url, 500, 700);
}

function showUploadPopUp(url){
	showNewWindow(url, 30, 400);
}