function changer_href(class_element, new_href){ 
	var elements = document.getElementsByTagName("*");
	for (var i=0;(element=elements[i]);i++){
		if (element.className==class_element){
			element.href = element.href+new_href;
		}
	}
}
function modifier_form(id_form, name_element, value_element){
	document.getElementById(id_form).temp.name=name_element;
	document.getElementById(id_form).temp.value=value_element;
	document.getElementById(id_form).submit();
}
function ouvrir_popup(url,nom,width,height) {
	var x = ((screen.width - width)/2)-15;
	var y = ((screen.height - height)/2)-20;
	winprops = "height="+height+",width="+width+",top="+y+",left="+x+",scrollbars=yes, resizable=yes";
	win = window.open(url, nom, winprops);
}