truc=false;
debut='';
function alertImage(text,width,height) {
if(truc!=false && !truc.closed){
truc.close();
truc=false;
}
if(!width)
width=500;
if(!height)
height=500;
truc=window.open('','alertWin','width='+width+',height='+height+',resizable=1');
truc.document.open();
truc.document.write(debut+text+fin);
truc.document.close();
}