// Joan Teixidó - www.ques-tions.net


<!--
function prova()
{
  var str="Hello world!";
document.write(str.indexOf("Hello") + "<br />");
document.write(str.indexOf("World") + "<br />");
document.write(str.indexOf("world"));
}

function Fotos(n)
{
  this.fotos_sortides = new Array();
  this.nombreFotos = n;
  this.foto_actual = 0;
  
  this.posarFoto = posarFoto;
  this.escriureHtml = escriureHtml;
  this.posarFoto();
}


function posarFoto()
{
  
  //calcular un random
   
   while(this.fotos_sortides.length <=this.nombreFotos-1)
   {
      rnd = Math.floor(this.nombreFotos*Math.random());
      var flag = false; 
   //comprova si hi és a l'array
   
   for (var a = 0;a<=this.fotos_sortides.length;a++)
   {
     if (rnd == this.fotos_sortides[a])
     {
       flag = true;
     }
     
   }
   if (flag == false)
   {
     this.fotos_sortides.push(rnd);
   }
   }
   }

function escriureHtml()
{
    //mirar cuantes files calen
    
    var files = Math.floor(this.nombreFotos / 20) + 1;
    var a = 0;
    
    for (var i = 0;i<this.fotos_sortides.length;i++)
    {
      if (a == 0)
      {
        document.write('<tr align="left" valign="top">');
        document.write('<td height="85"><img src="/donemlacara/positius/'+this.fotos_sortides[i]+'.jpg" alt="Sigues positiu!" width="56" height="85"></td>');
      
      } else {
      
      document.write('<td><img src="/donemlacara/positius/'+this.fotos_sortides[i]+'.jpg" alt="Sigues positiu!" width="56" height="85"></td>');
      }
      a++;
      if (a >=20)
      {
          document.write('</tr>');
        a = 0;
      }
      
     } 
  
}


function close()
{
element = document.getElementById('capa_fons');
element2 = document.getElementById('overlay');
element.style.visibility = 'hidden';
element2.style.visibility = 'hidden';

}


  
  
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];}
}

//-->

// funció per fer que les taules amb cert id tingui bandes //


function hasClass(obj) {
     var result = false;
     if (obj.getAttributeNode("class") != null) {
         result = obj.getAttributeNode("class").value;
     }
     return result;
  }

 function stripe(id) {

    // the flag we'll use to keep track of
    // whether the current row is odd or even
    var even = false;

    // if arguments are provided to specify the colours
    // of the even & odd rows, then use the them;
    // otherwise use the following defaults:
    var evenColor = arguments[1] ? arguments[1] : "#fff";
    var oddColor = arguments[2] ? arguments[2] : "#EEEDEF";

    // obtain a reference to the desired table
    // if no such table exists, abort
    var table = document.getElementById(id);
    if (! table) { return; }

    // by definition, tables can have more than one tbody
    // element, so we'll have to get the list of child
    // &lt;tbody&gt;s
    var tbodies = table.getElementsByTagName("tbody");

    // and iterate through them...
    for (var h = 0; h < tbodies.length; h++) {

     // find all the &lt;tr&gt; elements...
      var trs = tbodies[h].getElementsByTagName("tr");

      // ... and iterate through them
      for (var i = 0; i < trs.length; i++) {

        // avoid rows that have a class attribute
        // or backgroundColor style
        if (! hasClass(trs[i]) &&
            ! trs[i].style.backgroundColor) {

          // get all the cells in this row...
          var tds = trs[i].getElementsByTagName("td");

          // and iterate through them...
          for (var j = 0; j < tds.length; j++) {

            var mytd = tds[j];

            // avoid cells that have a class attribute
            // or backgroundColor style
            if (! hasClass(mytd) &&
                ! mytd.style.backgroundColor) {

              mytd.style.backgroundColor =
                even ? evenColor : oddColor;

            }
          }
        }
        // flip from odd to even, or vice-versa
        even =  ! even;
      }
    }
  }





//-->

// funció per comprovar el NIF //
  function comprovarNif(num) {
    if (num.length != 9) {

		return false;
	}

	var lletraNif = num.substr(8);
	lletraNif = lletraNif.toUpperCase();

	var dni = num.substr(0,8);
	var numero = dni % 23 + 1;
    letra='TRWAGMYFPDXBNJZSQVHLCKET';
    letra=letra.substring(numero-1,numero);
  	if (lletraNif != letra) {
		return false;
	}
	return true;
  }


	function escriureEmail(adress) {
		dom = "flsida.org";
		mail = adress+"@"+dom;
		document.write ("<a href='mailto:"+mail+"' >"+mail+"</a>");


	}