// Jquery
$(document) .ready(function() {
	$('.post img').each(function(){
    var width=450;       //输入指定宽度,图片高度自动适应
    var image = $(this);
    if(image.width()>width){
        image.height(width/image.width()*image.height());
        image.width(width);
        image.wrap("<a href='"+image.attr("src")+"' target='_blank'></a>").css("border","0");
		}
	});
});