function montrer(toggle, op, displ) {

	document.getElementById(toggle).style.display = displ;

	document.getElementById(op).href = "javascript:cacher('"+toggle+"', '"+op+"', '"+displ+"')";;

}		

function cacher(toggle, op, displ) {

	document.getElementById(toggle).style.display = "none";

	document.getElementById(op).href = "javascript:montrer('"+toggle+"', '"+op+"', '"+displ+"')";
}


function confirmer(txt)
{
var question=confirm(txt);
if (question)
	return true ;
else
	return false ;
}