downopen.js

DM642的入门级源程序,适合初学者学习

//load func

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

//download openpop

function createXMLHttpRequest() {
	if(window.ActiveXObject) {
		xmlHttp = new ActiveXObject("Microsoft.XMLHttp");
	} else if(window.XMLHttpRequest) {
		xmlHttp = new XMLHttpRequest();
	}
}

function downOpen() {
	if(document.getElementById("postlist")) {
		var down_open = document.getElementById("postlist");
		var links = down_open.getElementsByTagName("a");
		for(var i=0; i<links.length; i++) {
			if(links[i].rel) {
				links[i].rel = links[i].href;
				links[i].href = "#";
				links[i].onclick = createDownBlock;
			}
		}
	}
}


addLoadEvent(downOpen);

function createDownBlock() {
	if(!document.getElementById("down_block")) {
		var down_block = document.createElement("div");
		down_block.id = "down_block";
		var bodys = document.body;
		bodys.appendChild(down_block);
	} else {
		down_block = document.getElementById("down_block");
	}
	imgsrc = 'ad02.jpg';
	down_block.style.top = document.documentElement.scrollTop + 150 + "px"; 
	down_block.innerHTML = "<a href='#' target='_blank'><img class='pop_ad' src='images/"+imgsrc+"' alt='官方虚拟主机、域名火爆促销中' /></a><h2>" + "<h3>请选择下载：</h3><p style='text-align:center;'><a href=" + this.rel + "><img src='images/down_pop_dianxin.gif' alt='电信下载' /></a></p>";
	// <a href=" + this.rel.replace(/download.comsenz.com/,"download2.comsenz.com") + "><img src='images/down_pop_wangtong.gif' alt='网通下载' /></a>
	var closeLink = document.createElement("a");
	closeLink.href = "#";
	closeLink.title = "关闭";
	closeLink.innerText = "关闭"
	closeLink.className = "down_pop_close";
	closeLink.onclick = closeDownBlock;
	down_block.appendChild(closeLink);
	return false;
}

function closeDownBlock() {
	var bodys = document.body;
	bodys.removeChild(this.parentNode);
	return false;
}