/* Modifier l'opacite d'un element div ou autre  compatible ie, moz op, saf. */
function opacity(id, opacStart, opacEnd, millisec) { 
    //speed for each frame 
    var speed = Math.round(millisec / 100); 
    var timer = 0; 

    //determine the direction for the blending, if start and end are the same nothing happens 
    if(opacStart > opacEnd) { 
        for(i = opacStart; i >= opacEnd; i--) { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } else if(opacStart < opacEnd) { 
        for(i = opacStart; i <= opacEnd; i++) 
            { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } 
} 

//change the opacity for different browsers 
function changeOpac(opacity, id) { 
    var object = document.getElementById(id).style; 
    object.opacity = (opacity / 100); 
    object.MozOpacity = (opacity / 100); 
    object.KhtmlOpacity = (opacity / 100); 
    object.filter = "alpha(opacity=" + opacity + ")"; 
} 

function PlusOpacity(id, millisec) 
	{
    //if an element is invisible, make it visible, else make it invisible
	opacity(id, 0, 100, millisec);
	} 
function MinusOpacity(id, millisec) 
	{
	opacity(id, 100, 0, millisec);
	}

// Vide le texte dans la balise de message :
function ViderMessage()
	{
	document.getElementById("Message").innerHTML = "";
	}
// Mettre un message dans la balise "Message" :
function AjouterMessage(Phrase)
	{
	  		document.getElementById("Message").innerHTML = Phrase;
			PlusOpacity('Message', 500);
			setTimeout("MinusOpacity('Message', 1000)",2000);	
	}