function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) 
    if ((obj=MM_findObj(args[i]))!=null) {
        v=args[i+2];
        if (obj.style) {
            obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; 
    }
    obj.visibility=v; 
  }
}
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 checkEmail(checkThisEmail){
var myEMailIsValid = true;
var myAtSymbolAt = checkThisEmail.indexOf('@');
var myLastDotAt = checkThisEmail.lastIndexOf('.');
var mySpaceAt = checkThisEmail.indexOf(' ');
var myLength = checkThisEmail.length;
if (myAtSymbolAt < 1 ){myEMailIsValid = false}
if (myLastDotAt < myAtSymbolAt) {myEMailIsValid = false}
if (myLength - myLastDotAt <= 2){myEMailIsValid = false}
if (mySpaceAt != -1) {myEMailIsValid = false}
return myEMailIsValid
}

function getNumbers(){
	var ch=event.keyCode;
	if ((ch >= 48 && ch <= 57) || ch ==46 || ch ==13){event.returnValue = ch;}else{alert('ניתן להכניס רק ספרות');return false;}
}

function emptyField(textObj){
	if (textObj.value.length == 0) return true;
	for (var i=0; i<textObj.value.length; i++) {
		var ch = textObj.value.charAt(i);
		if (ch != ' ' && ch != '\t') return false;	
	}
	return true;	
}

//*************************************************************************************
// trim - this function deletes spaces around the string.
//*************************************************************************************
String.prototype.trim = function()
{
    // Use a regular expression to replace leading and trailing 
    // spaces with the empty string
    return this.replace(/(^\s*)|(\s*$)/g, "");
}


function check_fields(objForm){	
  if (objForm.memberPassword.value.trim() == '' && objForm.memberUsername.value.trim() == ''){
     alert(' "חובה למלא שדות  "שם משתמש"  ו"סיסמה ')
     objForm.memberUsername.focus();
     return false;
  }   
  if (objForm.memberUsername.value.trim() == '' ){
     alert('"חובה למלא שדה "שם משתמש')
     objForm.memberUsername.focus();
     return false;
  }

  if (objForm.memberPassword.value.trim() == ''){
      alert('"חובה למלא שדה "סיסמה') 
      objForm.memberPassword.focus();
      return false;
  }
  
  if (objForm.memberPassword.value.trim() != '' && objForm.memberUsername.value.trim() != ''){
     return true;
  }
 return false;
}


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

function grades_info(){
   var sortNumber,pageCurr,search_tz,url="";
   if($(div_grades)){$(div_grades).innerHTML = '<div style="color:#808080;height:100px;font-weight:800;"><br>... טוען <img src="../images/indicator.gif" width="10" height="10" hspace="5"></div>'}
   //new Ajax.Updater('div_grades', 'get_grades.asp', {asynchronous:true, parameters:Form.serialize('formGrades') });
   search_tz=document.getElementById('search_tz').value
   if (document.getElementById('sort')){sortNumber=document.getElementById('sort').value;}
   if (document.getElementById('pageCurr')){pageCurr=document.getElementById('pageCurr').value;}
   url='get_grades.asp?search_tz='+search_tz+'&sort='+sortNumber+'&pageCurr='+pageCurr
   new Ajax.Updater('div_grades',url, {asynchronous:true});
}

function onclick_sort(sortNumber){
   if (document.getElementById('sort')){document.getElementById('sort').value=sortNumber;}
   grades_info();
}
function onclick_toPage(pageCurr){
   if (document.getElementById('pageCurr')){document.getElementById('pageCurr').value=pageCurr;}
   grades_info();
}

function onsubmit_formSearch_header(formObj){
   var search_tz = formObj.search_tz.value;			
   if (emptyField(formObj.search_tz)) {window.alert("אנא מלא/י מס' תעודת זהות ");formObj.search_tz.focus();return false;}
   if (search_tz.length < 5){window.alert("אנא מלא/י מס' תעודת זהות, 5 תווים לפחות");formObj.search_tz.focus();return false;}
   return true;		
}