function MM_preloadgifs() { 
  var d=document; if(d.gifs){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadgifs.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_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 to open alert window------------------------
function alert_win(messege)
{
	var	alert_win = window.showModalDialog("/alert_messege.html",messege,"dialogHeight:130px;		 dialogWidth:200px;help:no;status:no;resizable: no;scroll:no;  ")
}
//--------------- function to open popup window------------------------
function open_window(url, width, height, top, left) //makes defualt values
{
if (open_window.arguments.length<4)
{
	open_window.arguments[4]=0;
	open_window.arguments[3]=0;
}
if (document.images)
   {  
	a="toolbar=no,member=no,location=no,directories=no,scrollbars=yes,status=no,copyhistory=no,resizable=yes,height="+open_window.arguments[2]+",width="+open_window.arguments[1]+", left="+open_window.arguments[4]+",top="+open_window.arguments[3];
	swin=window.open(open_window.arguments[0],"an",a );
   	swin.focus();
   } 
}


function confirmDelete (ur) 
{
	if (confirm("Are you sure you want to delete this record?")) 
		document.location.href=ur;
}
 
function conceptPop(id)
{
	open_window("/cgi-bin/math/concept_pop_up.pl?Id="+id, 350, 300, 0, 0);
}

function roundMe(n, d) {
  n = n - 0; // force number
  if (d == null) d = 2;
  var f = Math.pow(10, d);
  n += Math.pow(10, - (d + 1)); // round first
  n = Math.round(n * f) / f;
  n += Math.pow(10, - (d + 1)); // and again
  n += ''; // force string
  return d == 0 ? n.substring(0, n.indexOf('.')) :
      n.substring(0, n.indexOf('.') + d + 1);

}

function JHlp(uri)
{
		var  newWinBalnk=window.open("/about/javaHelp.html?rfrr="+location.href,"blankPage",'toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width=550,height=500,left=0,top=0');
	newWinBalnk.focus();
}

var show_div=0;

function putPreLoad()
{

if (document.location.href.indexOf('teacher_pages') > -1 || document.location.href.indexOf('pupil_pages') > -1 || document.location.href.indexOf('instructor_pages') > -1) {
	document.write('<table width=100% height=100% id=load_div dir=rtl><tr><td align=center valign=middle><img src=/gifs/bar.gif width=181 height=36 alt="אנא המתינו"><br><h3 style=color:#B62D2D>אנא המתינו בזמן שהדף נטען...</h3></td></tr></table>');
	show_div=1;
}
}

function deletePreLoad () {
	if(show_div==1)
	{
		document.getElementById("load_div").style.display='none';
	}
}