发布于 2017-01-27 23:44:42 | 118 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Javascript教程，程序狗速度看过来！

JavaScript客户端脚本语言

Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。

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弹出div显示遮罩层的效果，想必大家都有见到过吧，下面有个示例，大家可以参考下

 
//--------------------弹出层------------------- 
//popDivId:弹出层div的ID 
//dragDivId:用于拖动div的ID 
//isShowMask:是否显示遮罩层 
function popDivShow(popDivId, dragDivId, isShowMask) { 
if (isShowMask) { 
creatMask(popDivId); 
} 
var oWins = document.getElementById(popDivId); 
var oWins_title = document.getElementById(dragDivId); 
var bDrag = false; 
var disX = disY = 0; 
oWins.style.display = "block"; 
oWins_title.onmousedown = function(event) { 
var event = event || window.event; 
bDrag = true; 
disX = event.clientX - oWins.offsetLeft; 
disY = event.clientY - oWins.offsetTop; 
this.setCapture && this.setCapture(); 
return false; 
}; 
document.onmousemove = function(event) { 
if (!bDrag) 
return; 
var event = event || window.event; 
var iL = event.clientX - disX; 
var iT = event.clientY - disY; 
var maxL = document.documentElement.clientWidth - oWins.offsetWidth; 
var maxT = document.documentElement.clientHeight - oWins.offsetHeight; 
iL = iL < 0 ? 0 : iL; 
iL = iL > maxL ? maxL : iL; 
iT = iT < 0 ? 0 : iT; 
iT = iT > maxT ? maxT : iT; 
oWins.style.marginTop = oWins.style.marginLeft = 0; 
oWins.style.left = iL + "px"; 
oWins.style.top = iT + "px"; 
return false; 
}; 
document.onmouseup = window.onblur = oWins_title.onlosecapture = function() { 
bDrag = false; 
oWins_title.releaseCapture && oWins_title.releaseCapture(); 
}; 
} 
// 隐藏弹出层 
function popDivHidden(popDivId) { 
var oWins = document.getElementById(popDivId); 
oWins.style.display = "none"; 
window.parent.document.body.removeChild(window.parent.document.getElementById("maskDiv")); 
} 
// 获取弹出层的zIndex 
function getZindex(popDivId) { 
var popDiv = document.getElementById(popDivId); 
var popDivZindex = popDiv.style.zIndex; 
return popDivZindex; 

} 
// 创建遮罩层 
function creatMask(popDivId) { 
// 参数w为弹出页面的宽度,参数h为弹出页面的高度,参数s为弹出页面的路径 
var maskDiv = window.parent.document.createElement("div"); 
maskDiv.id = "maskDiv"; 
maskDiv.style.position = "fixed"; 
maskDiv.style.top = "0"; 
maskDiv.style.left = "0"; 
maskDiv.style.zIndex = getZindex(popDivId) - 1; 
maskDiv.style.backgroundColor = "#333"; 
maskDiv.style.filter = "alpha(opacity=70)"; 
maskDiv.style.opacity = "0.7"; 
maskDiv.style.width = "100%"; 
maskDiv.style.height = (window.parent.document.body.scrollHeight + 50) + "px"; 
window.parent.document.body.appendChild(maskDiv); 
maskDiv.onmousedown = function() { 
window.parent.document.body.removeChild(window.parent.document.getElementById("maskDiv")); 
}; 
}