.main_con img{    max-width: 610px;    height: auto;    cursor: pointer;    border: 0px double #cccccc;    padding: 2px;    zoom: expression( function(elm) {    
    if (elm.width>610)                 
    {  var oldVW = elm.width; elm.width=610;                                
   elm.height = elm.height*(610 /oldVW);                         
    }         
   elm.style.zoom = ‘1‘;            
   } (this));}