放大图片

function showBig(src) {    var showdiv = $('<div id="showBig_box"><a><img class="big_pro" src="' + src + '" ></a><div class="showBig_bg"></div></div>');    var hidea = $('<span class="closeBig"><img src="/images/delate_cha.png"></span>');    hidea.click(function () {        $("#showBig_box").remove();    });    showdiv.find("a").append(hidea);    $("body").append(showdiv);    $("#showBig_box").show();}