function egaliser_colonnes(){
	
	var contenuBottom = $( '#contenu' ).offset().top + $('#contenu').outerHeight();
	var colonneDroiteBottom = $( '#colonne-droite' ).offset().top + $('#colonne-droite').outerHeight();
  	var colonneGaucheBottom = $( '#colonne-gauche' ).offset().top + $('#colonne-gauche').outerHeight();
  
  	//alert( colonneGaucheBottom + ' '  + contenuBottom + '  ' + colonneDroiteBottom );
  
	// Contenu is the bigger one
	if( contenuBottom > colonneGaucheBottom && contenuBottom > colonneDroiteBottom ){
		var diff = contenuBottom - colonneGaucheBottom;
    	var cssHeight = $('#colonne-gauche').outerHeight() + diff;
		$('#colonne-gauche').height( cssHeight );
    
	    var diff = contenuBottom - colonneDroiteBottom;
	    var cssHeight = $('#colonne-droite').outerHeight() + diff;
	    $('#colonne-droite').height( cssHeight );
	}
	// ColonneDroite is the bigger one
	else if(colonneDroiteBottom > colonneGaucheBottom && colonneDroiteBottom > contenuBottom){
	    var diff = colonneDroiteBottom - colonneGaucheBottom;
	    var cssHeight = $('#colonne-gauche').outerHeight() + diff;
	    $('#colonne-gauche').height( cssHeight );
    
	    var diff = colonneDroiteBottom - contenuBottom;
	    var cssHeight = $('#contenu').outerHeight() + diff;
	    $('#contenu').height( cssHeight );
	}
	// ColonneGauche is the bigger one
	else if(colonneGaucheBottom > contenuBottom && colonneGaucheBottom > colonneDroiteBottom){
    	var diff = colonneGaucheBottom - colonneDroiteBottom;
	    var cssHeight = $('#colonne-droite').outerHeight() + diff;
	    $('#colonne-droite').height( cssHeight );
    
    	var diff = colonneGaucheBottom - contenuBottom;
	    var cssHeight = $('#contenu').outerHeight() + diff;
	    $('#contenu').height( cssHeight );
	}
  	
}