function lockScreen()
{
sWidth=$(window).width();
sHeight=$(window).height();
var bgObj=document.createElement("div");
bgObj.setAttribute('id','bgDiv');
bgObj.style.position="absolute";
bgObj.style.top="0";
bgObj.style.background="#CCCCCC";
bgObj.style.filter="progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75";
bgObj.style.opacity="0.6";
bgObj.style.left="0";
bgObj.style.width=sWidth + "px";
bgObj.style.height=sHeight + "px";
if(sWidth < 860)
{
bgObj.style.width="860px";
}
bgObj.style.zIndex = "10000";
document.body.appendChild(bgObj);
}
使用如上函数可以锁住页面防止多次操作,要直到下载框出现时取消锁屏。
在服务器端（cgi）中设置cookie：
char *configDownloadToken = "finishedDownloadFile";
printf("Content-Type: application/octet-stream\nContent-Length: %ld\n", s.st_size);
printf( "Set-Cookie:configDownloadToken=%s; path=/; \r\n ",configDownloadToken);
printf("Content-Disposition: attachment; filename=\"%s\"\n", strrchr(filename,'//m.sbmmt.com/m/') + 1);
printf("Connection: close\n\n");
在客户端（html、js）导入插件jquery.cookie.js，在html文件中要包含此插件，js文件中定时获取cookie
var configDownloadCheckTimer;
$(document).ready(function () {
configDownloadCheckTimer = window.setInterval(function() {
var cookieValue = $.cookie('configDownloadToken');
if (cookieValue === "finishedDownloadFile")
{
refreshPage();
finishDownload();
}
}, 1000);
});
function finishDownload() {
window.clearInterval(configDownloadCheckTimer);
$.removeCookie('configDownloadToken'); //clears this cookie value
}
这样就可以了。
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