用Regex 動態建立/增加css style script 相容IE firefox

來源:互聯網
上載者:User

str 是表示通過ajax返回的XMLRequest
/*動態載入css style*/
function loadStyle(str)
{
var regExp_src=/<style.*src\s*=\s*["'][^"']*["'].*>[^<>]*<\/style\s*>/gi;
var matchArray_src=str.match(regExp_src);
alert(matchArray_src[0]);
if(matchArray_src){
for(var i=0;i<matchArray_src.length;i++)
{alert("sss");
var str_temp = matchArray_src[i].toString();
var regExp_src_temp = /<style.*src\s*=\s*["']([^"']*)["'].*>[^<>]*<\/style\s*>/gi;
str_temp.match(regExp_src_temp);/*這裡重複使用匹配是為了,$1這個子運算式指向當前的值,否則會永遠是最後一個$1值*/
var head = document.getElementsByTagName('head')[0];
/*IE*/
if(document.all){
alert("IE");
if(document.getElementsByTagName('style')[0])
{
var sty=document.getElementsByTagName('style')[0].innerHTML;
alert(sty);
var sty = document.getElementsByTagName('style')[0].innerHTML;
//不知道怎麼樣取得IE當前的style標籤,用getElementsByTagName不行,只能采此下策,建立一個新的,並加上以前的樣式
var styleSheet = document.createStyleSheet();
styleSheet.cssText=sty+RegExp.$1;
}
else
{
var styleSheet = document.createStyleSheet();
styleSheet.cssText="body{background:red;}\<br\>"
alert("finished");
}
}
/*FIREFOX*/
else{
var style;
if(document.getElementsByTagName('style')[0])
{
var sty=document.getElementsByTagName('style')[0].innerHTML;
alert(sty);
document.getElementsByTagName('style')[0].innerHTML=sty+RegExp.$1;
}
else
style=document.createElement('style');
style.type = 'text/css';
style.innerHTML=RegExp.$1;
head.appendChild(style);
alert(RegExp.$1);
}
}
}
}
/*動態載入具有src屬性的script*/
function loadScript_src(str){
var regExp_src=/<script.*src\s*=\s*["'][^"']*["'].*>[^<>]*<\/script\s*>/gi;
var matchArray_src=str.match(regExp_src);
if(matchArray_src)
{
for(var i=0;i<matchArray_src.length;i++)
{
var str_temp = matchArray_src[i].toString();
var regExp_src_temp = /<script.*src\s*=\s*["']([^"']*)["'].*>[^<>]*<\/script\s*>/gi;
str_temp.match(regExp_src_temp);
var head = document.getElementsByTagName('head')[0];
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = RegExp.$1;
script.defer="true";
head.appendChild(script);
alert(RegExp.$1);
}
}
}
/*動態載入innerHTML 中的Script*/
function loadScript(str){
var regExp_function=/<script[^>]*>([\s\S]*?)<\/script[\s]*>/gi;
var matchArray_function=str.match(regExp_function);
if(matchArray_function){
for(var i=0;i<matchArray_function.length;i++){
var str_temp=matchArray_function[i].toString();//其實用Regex的向前向後尋找的話是很方便的,但javascript卻不支援,所以只能採取此下策
var regExp_function_temp=/<script[^>]*>([\s\S]*?)<\/script[\s]*>/gi;
var matchArray_temp=str_temp.match(regExp_function_temp);
eval(RegExp.$1);
}
}
}
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