//  pwgeneral.js
//  Javascript functions that do not depend on 3rd-party js library

function addEvent(obj, evType, fn){ 
 if (obj.addEventListener){ 
   obj.addEventListener(evType, fn, false); 
   return true; 
 } else if (obj.attachEvent){ 
   var r = obj.attachEvent("on"+evType, fn); 
   return r; 
 } else { 
   return false; 
 } 
}

function emailIsValid(e) {
    var emailFilter=/^.+@.+\..{2,3}$/;
    if (!(emailFilter.test(e))) {
           return false;
    }
    var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\]]/
    if (e.match(illegalChars)) {
       return false;
    }
    return true;
}

function toggleRemove(el_id){
    var curstyle=document.getElementById(el_id).style;
    //curstyle.display=(curstyle.display=='none')?'block':'none';
    if (curstyle.display == 'none') {
        // Add it back and display "hide"
        curstyle.display = 'block';
        document.getElementById(el_id+'_hide').style.display = 'inline';
        document.getElementById(el_id+'_show').style.display = 'none';
    }
    else {
        // Remove it and display "show"
        curstyle.display = 'none';
        document.getElementById(el_id+'_hide').style.display = 'none';
        document.getElementById(el_id+'_show').style.display = 'inline';
    }
}

function chrCounter(txt_elid, display_elid, total) {
    // txt_elid: the element with chars to be counted
    // display_elid: the element to display the current char len
    // total: total
    l = document.getElementById(txt_elid).value.length;
    document.getElementById(display_elid).innerHTML = '(' + l + ' / ' + total + ')';
}

//  Four methods for swapping 2 images
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_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_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];}
}