function MostraForm(a,boton){
  var e=document.getElementById(a);
  if(!e)return true;
  if(e.style.display=="none"){
    e.style.display="block";
    boton.value=1;
  } else {
    e.style.display="none";
    boton.value=0;
  }
  return true;
}


function toggleMe3(a,boton){
  var e=document.getElementById(a);
  if(!e)return true;
  if(e.style.display=="none"){
    e.style.display="block";
boton.value="-"; 
  } else {
    e.style.display="none";
boton.value="+";
  }
  return true;
}

function toggleMe2(a,b,boton){
  var e=document.getElementById(a);
  if(!e)return true;
  if(e.style.display=="none"){
    e.style.display="block";
    boton.value="-";
  } else {
    e.style.display="none";
    boton.value="+";    
}

 var f=document.getElementById(b);
  if(!f)return true;
  if(f.style.display=="none"){
    f.style.display="block"
  } else {
    f.style.display="none"
  } 

  return true;
}

function toggleMe(a){
  var e=document.getElementById(a);
  if(!e)return true;
  if(e.style.display=="none"){
    e.style.display="block"
  } else {
    e.style.display="none"
  }
  return true;
}

function tipusCerca(form)
{
if (form.searchField.value==2)
   {form.searchField.value = 0}
else
   {form.searchField.value = 2}  
}

function validarCercaArticles(form)
{come="\"";

if(form.ckTitle.checked)
{kk=form.title.value;
 form.title.value="\"";
 form.title.value=form.title.value.concat(kk);
 form.title.value=form.title.value.concat("\"");
}

if(form.ckAuthor.checked)              
{kk=form.author.value;  
 form.author.value="\"";  
 form.author.value=form.author.value.concat(kk);    
 form.author.value=form.author.value.concat("\"");    
}

if(form.ckquery.checked)              
{kk=form.query.value;  
 form.query.value="\"";  
 form.query.value=form.query.value.concat(kk);    
 form.query.value=form.query.value.concat("\"");    
}

treureText(form.title,form.textsearch);
treureText(form.author,form.textsearch);
treureText(form.query,form.textsearch);

if ((form.title.value.length==0) & (form.author.value.length==0)  & (form.query.value.length==0) ) 
{alert (form.notexttosearch.value);
return false;
}
else
{
treureText(form.title,form.textsearch);
treureText(form.author,form.textsearch);
treureText(form.query,form.textsearch);
form.submit();
return true;
}
}


function treureText(form,text)   
{
aux=form.value.substring(1,form.value.length);
if (aux==text.value)     
form.value="";

}




function validarCercaRevistes(form)
{form.submit();
return true;
}