$(function() { 
$(".dvcontent img").each(function() { 
var maxwidth = 520; 
if ($(this).width() > maxwidth) { 
var oldwidth = $(this).width(); 
var oldheight = $(this).height(); 
var newheight = maxwidth/oldwidth*oldheight; 
$(this).css({width:maxwidth+"px",height:newheight+"px",cursor:"pointer"}); 
$(this).attr("title","点击查看原图"); 
$(this).click(function(){window.open($(this).attr("src"))}); 
} 
}); 
});