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星鸿娱乐javascript动态添加样式(行内式/嵌入式/

  

[动态添加,样式规则]javascript动态添加样式(行内式/嵌入式/外链式等规则)

  添加CSS的方式有行内式、嵌入式、外链式、导入式  
a)动态引入样式表文件:  
代码如下:
  
function loadLink(url){  
var link = document.createElement("link");  
link.type = "text/css";  
link.rel = "stylesheet";  
link.href = url;  
var head = document.getElmentsByTagName("head")[0];  
head.appendChild(link);  
}  
  
b)嵌入式:  
代码如下:
  
function insertStyles(){  
var doc,cssCode=[],cssText;  
var len = arguments.length;  
var head,style,firstStyle;  
if(len == 1){  
doc = document;  
cssCode.push(arguments[0])  
}else if(len == 2){  
doc = arguments[0];  
cssCode.push(arguments[1]);  
}else{  
alert("函数最多接收两个参数!");  
}  
head = doc.getElementsByTagName("head")[0];  
styles= head.getElementsByTagName("style");  
if(styles.length == 0){  
if(doc.createStyleSheet){//ie  
doc.createStyleSheet();  
}else{//FF  
var tempStyle = doc.createElement("style");  
tempStyle.setAttibute("type","text/css");  
head.appendChild(tempStyle);  
}  
}  
firstStyle = styles[0];  
cssText=cssCode.join("\n");  
if(!+"\v1"){//opacity兼容  
var str = cssText.match(/opacity:(\d?\.\d+);/);  
if(str!=null){  
cssText = cssText.replace(str[0],"filter:alpha(opacity="+pareFloat(str[1])*100+")");  
}  
}  
if(firstStyle.styleSheet){  
firstStyle.styleSheee.cssText += cssText;  
}else if(doc.getBoxObjectFor){  
firstStyle.innerHTML += cssText;  
}else{  
firstStyle.appendChild(doc.createTextNode(cssText));  
}  
}  
  
c)行内式:  
代码如下:
  
var addStyle=function (ele,str){  
var s = ele.getAttribute("style"),styles;  
if(str && typeof str === "string"){  
if(!s){  
ele.style.cssText = str;  
}else{  
if(s == '[object]'){//IE6/7 e.getAttribute("style")返回[object]  
s=ele.style.cssText;  
}  
styles= trim(s).split(";");  
for (var i=0,len=styles.length; ivar style_i=trim(styles[i]);  
var attr=style_i.split(":")[0];  
if(str.indexOf(attr)>-1){  
styles[i]="";  
}else{  
styles[i]=style_i;  
}  
}  
ele.style.cssText= styles.join("")+";"+str;  
}  
}  
}  
  
d)导入式:  
import "index.css";  
操作CSS 类相关的方法:  
代码如下:
  
var hasClass=function(ele,value){  
var rclass = /[\n\t\r]/g,  
value=" "+value+" ";  
return (ele.nodeType==1)&&(" "+ele.className+" ").replace(rclass," ").indexOf(value)>-1;  
}  
var trim=function (val){  
return val.replace(/(^\s+)|(\s+$)/g,"");  
}  
var addClass=function(ele,value){  
var rspace = /\s+/,classNames,getClass;  
if(value&&typeof value === "string"){  
classNames = value.split(rspace);  
if(ele.nodeType === 1){  
if(!ele.className && classNames.length == 1){  
ele.className = value;  
}else{  
getClass = " "+ele.className+" ";  
for(var i=0,len=classNames.length; ivar cname=classNames[i];  
if(!hasClass(ele,cname)){  
getClass += cname+" ";  
}  
}  
ele.className = trim(getClass);  
}  
}  
}  
}  
var removeClass=function(ele,value){  
var rclass = /[\n\t\r]/g,classNames,getClass;  
if((value&&typeof value === "string")||value === undefined){  
classNames = (value||"").split(rspace);  
if(ele.nodeType === 1 && ele.className){  
if(value){//存在查找要移除的类  
getClass = " "+ele.className+" ".replace(rclass," ");//左右空格,为了使类中各类间均等,方便后面替换  
for(var i=0,len=classNames.length; igetClass = getClass.replace(" "+classNames[i]+" "," ")  
}  
ele.className=trim(getClass);  
}else{//不存在移除所有类  
ele.className = "";  
}  
}  
}  
}  
var toggleClass=function(ele,value){  
if(typeof 星鸿娱乐平台 value === "string"){  
if(hasClass(ele,value)){  
removeClass(ele,value);  
}else{  
addClass(ele,value);  
}  
}  
}  

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