• 图片预加载


    <script type="text/JavaScript">
    <!--
    function MM_preloadImages() { //v3.0
      var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
        var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
        if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
    }

    function MM_swapImgRestore() { //v3.0
      var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
    }

    function MM_findObj(n, d) { //v4.01
      var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
        d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
      if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
      for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
      if(!x && d.getElementById) x=d.getElementById(n); return x;
    }

    function MM_swapImage() { //v3.0
      var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
       if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
    }
    //-->
    </script>
    </head>

    <body onload="MM_preloadImages('images/main_26_1.gif','images/main_29_1.gif','images/main_31_1.gif')">

     <script type="text/javascript">
                        jQuery.preloadImages = function() {
                            for (var i = 0; i < arguments.length; i++) {
                                jQuery("<img>").attr("src", arguments[i]);
                            }
                        }
                         $(document).ready(function() {
                                $.preloadImages('images/main_26_1.gif','images/main_29_1.gif','images/main_31_1.gif');
                            });
                    </script>

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  • 原文地址:https://www.cnblogs.com/zwei1121/p/2152998.html
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