function eliminar_c(id)
{
	if (confirm("N'estās segur/a? Si continues no podrās recuperar el concert eliminat")){
		document.eliminar.id.value=id;
		document.eliminar.submit();
	}


}

function afegir_c(form)
{

	if(document.nou_concert.dia.value=="")
	{
		alert("No has introduīt el dia del concert");
		document.nou_concert.mes.focus();
		return;
	}

	else if(document.nou_concert.ciutat.value=="")
	{
		alert("No has introduīt la ciutat");
		document.nou_concert.ciutat.focus();
		return;
	}
	else if(document.nou_concert.grups_sel.length<1)
	{
		alert("No has seleccionat cap grup");
		document.nou_concert.comarca.focus();
		return;
	}
	else
	{
		selTots(form);
		document.nou_concert.submit();
	}

}

function selTots(form)
{
	var l = form.grups_sel.length -1;
	
	for(l; l>-1;l--)
	{
		form.grups_sel.options[l].selected=true;
	}


}


function addUser(form) {
	var fl = form.grups.length -1;
	var au = form.grups_sel.length -1;

	var users = "x";

	//build array of assiged users
	for (au; au > -1; au--) {
		users = users + "," + form.grups_sel.options[au].value + ","
	}

	//Pull selected resources and add them to list
	for (fl; fl > -1; fl--) {
		if (form.grups.options[fl].selected && users.indexOf( "," + form.grups.options[fl].value + "," ) == -1) {
			t = form.grups_sel.length
			opt = new Option( form.grups.options[fl].text, form.grups.options[fl].value, form.grups.options[fl].selected);
			form.grups_sel.options[t] = opt
		}
	}
}

function removeUser(form) {
	fl = form.grups_sel.length -1;
	for (fl; fl > -1; fl--) {
		if (form.grups_sel.options[fl].selected) {

			form.grups_sel.options[fl] = null;
		}
	}
}