function reimg(obj){
    var isIE = !!document.all;
    if(typeof(obj)=='string'){
        var nobj=document.getElementById(obj);
    }else if(typeof(obj)=='object'){
        var nobj=obj;
    }else{
        return false;
    }
    if(nobj.style.cursor!='pointer'){nobj.style.cursor='pointer'};
    var url=nobj.src+'?'+(new Date).getTime();
    if(isIE){
        nobj.id=nobj.id==''?'time_temp_id_'+(new Date).getTime():nobj.id;
        nobj.outerHTML="<IMG id='"+nobj.id+"' alt='"+nobj.alt+"' onclick='' width='"+nobj.width+"' height='"+nobj.height+"' SRC='"+url+"'>";
        var bobj=document.getElementById(nobj.id);
        bobj.onclick=nobj.onclick;
        bobj.style.cursor='pointer';
    }else{
        nobj.src=url;
    }
}