javascript-特效
事件
<body onmousedown="show_coords(event)">
function show_coords(ev){
alert("X 坐标: " + ev.clientX + ", Y 坐标: " + ev.screenX)
}
遮罩滚动层
<html>
<head>
<script language="javascript" type="text/javascript" >
var timerID = 0;//必须的
function StartGO(){
var bgObj0=document.createElement("div");
bgObj0.style.position="absolute";
bgObj0.style.backgroundColor="#eeeeee";
if(document.all){
bgObj0.style.filter = "alpha(opacity=50)";
}else{
bgObj0.style.MozOpacity = 0.5;
bgObj0.style.opacity = 0.5;
}
bgObj0.style.top = "0px";
bgObj0.style.left = "0px";
bgObj0.style.width = "100%"
var s_height=document.body.scrollHeight;
if(s_height<window.screen.availHeight){
s_height=window.screen.availHeight;
}
bgObj0.style.height=s_height+"px"//设置高度
bgObj0.style.zIndex = 1000;
var bgObj=document.createElement("div");
bgObj.style.position="absolute";
bgObj.style.backgroundColor="#ff0000";
bgObj.style.top = "300px";
bgObj.style.left = "300px";
bgObj.style.width = "300px"
bgObj.style.height = "300px"
bgObj.style.zIndex = 1001;
document.body.appendChild(bgObj0);
document.body.appendChild(bgObj);
//关闭按钮//也可以这样写啊？
var c = document.createElement("div");
c.innerHTML = "关闭";
c.style.cssText = "text-decoration:underline; cursor:pointer;";
c.onclick = function(){
document.body.removeChild(bgObj);
document.body.removeChild(bgObj0);
clearInterval(timerID);//clearInterval() 方法可取消由 setInterval() 设置的 timeout。
document.body.scrollTop="0px";
};
bgObj.appendChild(c);
clearInterval(timerID);
//clearInterval() 方法可取消由 setInterval() 设置的 timeout。
timerID = setInterval(function(){move(bgObj);}, 10);
//timerID = setInterval(move,10,bgObj);等效于上面的
alert(timerID);//如果页面不刷新timerID为2,3,4,5递增的
//setInterval() 按照指定的周期（以毫秒计）来调用函数或计算表达式。
//setInterval() 方法会不停地调用函数，直到 clearInterval() 被调用或窗口被关闭。由 setInterval() 返回的 ID 值可用作 clearInterval() 方法的参数。
}
function move(obj){
if(obj){
obj.style.top = document.body.scrollTop +300+ "px";
}
}
</script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head>
<body >
<div id="content">
<input type="button" value="OK" id="btnOK" onclick="StartGO()"/> <br>
大家好！<br>
底部有数字内容！
滚动遮罩层
指定遮罩层
</div>
<div style="margin-top:1000px">123</div>
</body>
</html>
js层：
<html>
<head>
<script language="javascript" type="text/javascript">
function openFloat(obj) {
// alert(floatArea+floatArea.offsetLeft+"-"+floatArea.offsetTop); //[object HTMLDivElement]160-262
floatArea = document.getElementById("ok");
var leftpos = 0,toppos = 0;
var pObject = obj.offsetParent;
//if (pObject){
//leftpos += pObject.offsetLeft;
//toppos += pObject.offsetTop;
//alert( pObject+pObject.offsetLeft+"-"+pObject.offsetTop);//[object HTMLBodyElement]0-0
//alert(obj+obj.offsetLeft+"-"+obj.offsetTop); //[object HTMLInputElement]190-292
//}
//alert(leftpos);
while(pObject){//必须的，能否合并于if，用coupon_release.html测试？？？？？？？？？？
leftpos += pObject.offsetLeft;
toppos += pObject.offsetTop;
alert(pObject+leftpos+"-"+pObject.offsetLeft);
pObject = pObject.offsetParent;
}
//alert(0);
//alert(floatArea+floatArea.offsetLeft+"-"+floatArea.offsetTop);//[object HTMLDivElement]160-262
floatArea.style.left = (leftpos) + "px";
alert(floatArea.style.left);
floatArea.style.top = (obj.offsetTop + toppos + obj.offsetHeight - 1) + "px";
//alert(floatArea+floatArea.offsetLeft+"-"+floatArea.offsetTop);//[object HTMLDivElement]190-312
floatArea.innerHTML="<a href='javascript:closeFloat();'>关闭</a><br>test层中表单<br>"
+"<form><input type='text' name='name' id='name'/><br></form>"
floatArea.style.width = "300px";
floatArea.style.height = "300px";
floatArea.style.border = "#ff0000 1px solid";
floatArea.style.background="#eeeeee";
floatArea.style.display = "block";
}
function closeFloat() {
floatArea = document.getElementById("ok");
floatArea.innerHTML = "";
floatArea.style.display = "none";
}
</script>
</head>
<body >
<from style="position:relative;float:left;margin-left:50px;margin-top:50px;border:#ff0000 1px solid">
<h1>测试DIV层</h1>
<input type="text" name="name" id="name"/><br>
<div style="position:relative;float:left;margin-left:30px;margin-top:30px;border:#ff0000 1px solid">
<div id="sub" style="position:relative;float:left;margin-left:100px;margin-top:100px;border:#ff0000 1px solid">
<input type="button" value="test" onclick="openFloat(this)"/><br>
hello,wnj<br>
</div>
<div id="ok" style="position:relative;background-color:#eeeeee;display:none"></div>
</div>
</from>
</body>
</html>