// JavaScript Document
// Project: LMS China v1.0
// Date:   08/25/2005

/*
 * Get Brower Type (IE or FireFox/Netscape 8.0).
 * Global variable 
 *
**/
	
 var agt = navigator.userAgent.toLowerCase();  
 var is_ie = (agt.indexOf("msie")!=-1 && document.all);
 var is_firefox = (agt.indexOf("firefox")!=-1);

/* Function Name ---- showWindow
 * frame         -> frame name or frame id
 * link2         -> link name or link id
 * Frw           -> frame width
 * Frh           -> frame heigth
 * position      -> positon that relate to link2
 * elementWidth  -> is only for firefox when the iframe will show on the right of link2
 **/
function showWindow(frame,link2,Frw,Frh,position,elementWidth)  //elementWidth is for firefox
{
	var Frl,Frt,Winw,Winh,left;
	Winw = document.body.offsetWidth; 
	Winh = document.body.offsetHeight;
	link = eval(document.getElementById(link2));	
	if(is_ie) {
		if(position == 'left') {
			Frl=link.getBoundingClientRect().left;
		} else if(position == 'right') {
			Frl=link.getBoundingClientRect().right;
		} else {
			Frl = (Winw - Frw) / 2;	
		}

		Frt=link.getBoundingClientRect().top +document.body.scrollTop;

	} else if( is_firefox ) {

		var top = GetAbsolute(link,'top');

		var left = GetAbsolute(link,'left');
		
		if(position == 'left') {
			
			Frl = left; 
		
		} else if(position == 'right') {

			Frl = left + elementWidth;

		} else  {

			Frl = (Winw - Frw) / 2;
		}

		Frt = top;
	}

	if (((Frl+Frw)>Winw)&&(Frw<Winw)) {
 		
		Frl=Frl-Frw;
	}
		
	if ((Frt+Frh>Winh)&&(Frh<Winh)) {
  
  		Frt=Frt-Frh;
	}
		
	eval("document.getElementById(frame).style.display='block'");
	
	eval("document.getElementById(frame).style.left=Frl-2+'px'");
	
	eval("document.getElementById(frame).style.top=Frt+15+'px'");
	
}

function GetAbsolute(element,attribute) 
{ 
	
    if ( arguments.length != 2 || element == null ) 
    { 
        return null; 
    } 

    var elmt = element; 

    var offsetTop = elmt.offsetTop; 

	var offsetLeft = elmt.offsetLeft;
		
    while( elmt.offsetParent )  { 

		elmt = elmt.offsetParent

        offsetTop += elmt.offsetTop; 

		offsetLeft += elmt.offsetLeft;

    } 

	if( attribute == 'top') return offsetTop;

	else if( attribute == 'left') return offsetLeft;

	else return 0;

} 



/* Moving option(s) from one select box to another select box.
 * 3 functions move(fbox,tbox),BumpUp(box),SortD(box),notSelect(box),notSelect(box)
 * 
 */
 
function move(fbox,tbox)
{
	var selectFlag = 0;
	
    for(var i = 0; i < fbox.options.length; i++)
		if(fbox.options[i].selected)
	       selectFlag = 1;  
    if(selectFlag == 0) return ;
    
	for(var i = 0; i < fbox.options.length; i++)
	{
		if(fbox.options[i].selected && fbox.options[i].value != "")
		{
			// Add Item
			var no = new Option();
			no.value = fbox.options[i].value;
			no.text = fbox.options[i].text;
			tbox.options[tbox.options.length] = no;
			// Delete Item
			fbox.options[i].value = "";
			fbox.options[i].text = "";
		}
	}
	//
	SortD(tbox);
	SortD(fbox);
	notSelect(tbox);
	notSelect(fbox);
	BumpUp(fbox);
}

function BumpUp(box)
{
	for(var i = 0; i < box.options.length; i++)
	{
		if(box.options[i].value == "")
		{
			for(var j = i; j<box.options.length - 1; j++)
			{
				box.options[j].value = box.options[j + 1].value;
				box.options[j].text = box.options[j + 1].text;
			}
			var ln = i;
			break;
		}
	}
	if(ln < box.options.length)
	{
		box.options.length -= 1;
		BumpUp(box);
	}
}
	
function SortD(box)
{
	var temp_optsText = new Array();
	var temp_optsValue = new Array();
	var temp = new Object();
	for(var i = 0; i < box.options.length; i++)
	{
		temp_optsText[i] = box.options[i].text;
		temp_optsValue[i] = box.options[i].value;
	}

	for(var x = 0; x < temp_optsText.length-1; x++)
	{
		for(var y = (x + 1); y < temp_optsText.length; y++)
		{
			if(temp_optsText[x] > temp_optsText[y])
			{
			
				temp = temp_optsText[x];
				val = temp_optsValue[x];
				temp_optsText[x] = temp_optsText[y];
				temp_optsValue[x]= temp_optsValue[y];
				temp_optsText[y] = temp;
				temp_optsValue[y]=val;
			}

			}
	}
	for(var i = 0; i < box.options.length; i++)
	{
		box.options[i].value = temp_optsValue[i];
		box.options[i].text = temp_optsText[i];
	}
}

function notSelect(box)
{
	for(var i=0;i<box.options.length;i++)
		box.options[i].selected=false;
}

function Select(box)
{
	for(var i = 0; i < box.options.length; i++)
	{
		box.options[i].selected = true;
	}
}
/* Moving option(s) from one select box to another select box.
 * Ending -
 */

 

 /* Form validate
  * AtTrim(),jsCheckInt(),jsCheckMail(),jsCheckDate()
  */
function AtTrim(s)
{
	var r1, r2, s1, s2, s3;
    r1 = new RegExp("^ *");
    r2 = new RegExp(" *$");

    s1 = ""+s+"";
    s2 = s1.replace(r1, "");
    s3 = s2.replace(r2, "");
    
    r1 = null;
    r2 = null;

    return(s3);
}
		
function jsCheckInt(s)	{
	var rd =/^\d{1,20}$/;
	
	if(!rd.test(s)) {
		alert("Please input a valid integer for field");
		return false;
	}
	return true;
}

function jsCheckIntForField(s,fieldName)	{
	var rd =/^\d{1,20}$/;
	
	if(!rd.test(s)) {
		alert("Please input a valid integer for "+fieldName+".");
		return false;
	}
	return true;
}

function jsCheckMail(str)
{
	var filter=/^[\.\-_0-9a-zA-Z]+@([0-9a-zA-Z][0-9a-zA-Z-]+\.)+[a-zA-Z]+$/
	tempstr = str.split(";");
	for(i = 0;i < tempstr.length;i ++)
	{
		if(!filter.test(tempstr[i]))
			return false;
	}
	return true;
}
function MM_openBrWindow(theURL,winName,features)
{ //v2.0
	window.open(theURL,winName,features);
} 

function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}

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 backPage()
{
    window.location.href = "sessionlist.jsp";
}
//count the str's length ,if it included some 2-word chars such as chinese,the length is 2
function byteLength(str)
{
	var x=0;
	for (i=0; i<str.length; i++) {
		if(str.charCodeAt( i) > 128){
			x=x+2;
		}else{
			x=x+1;
		}
	}
	return x;
}