用jquery等比例控制图片宽高的具体实现_jquery

$(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);
        }
    });
});