$(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"))}); 
} 
}); 
}); 

$(window).load(function() {
 $(".dvcontent img").each(function() { 
 var maxwidth = 600; 
 if ($(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"))}); 
 } 
 }); 
});

.cate img{
    max-width: 600px; 
    height:auto; 
    width:expression(this.width > 600 ? "600px" : this.width);
 }

$(window).load(function() {
    $(".cate img").each(function() {
        var maxwidth = 600;
        if ($(this).width() > maxwidth) {
            $(this).width(maxwidth);
        }
    });
});