function is_numeric(num){
		var exp = new RegExp("^[0-9-.]*$","g");
		return exp.test(num);
}
	
	
function ereg(str, mask){	
	if  (str.search(mask) != -1)
	return true;	
	else 
	return false;
}








//Gestion de Fondus	////////////////////////////////////////////////////////////////////////
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++; 
        } 
    } 
//	setTimeout("document.getElementById("+id+").style.display=\"none\";","3000");
} 

//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 + ")"; 
	
} 
//Fin Gestion de Fondus	////////////////////////////////////////////////////////////////////////



function info_retour(txt,id,temps) { 

	document.getElementById(id).innerHTML ="<div id=\"retour_action\">"+txt+"</div>";
	timer=setTimeout("opacity('retour_action', 100, 0, 500)", temps);	
	setTimeout("document.getElementById('retour_action').style.display=\"none\";",1500);

}

function affiche_menu(id, value){
	document.getElementById(id).style.display=value;
	
	//setTimeout("document.getElementById("+id+").style.display=\"block\";",1500);
	
}