Dynamically create/Add CSS style script with regular expressions Firefox_javascript skill of IE

STR is the xmlrequest that is returned via Ajax
/* Dynamically load 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);/* This is used to repeat the match so that the subexpression points to the current value, otherwise it will always be the last value.
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;
Do not know how to get IE current style label, with getElementsByTagName, can only take this unwise, create a new, and add the previous style
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);
}
}
}
}
/* Dynamically load script*/with SRC attribute
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);
}
}
}
/* script*/in Dynamic loading innerHTML
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 ()//In fact, it is convenient to look backwards with regular expressions, but JavaScript is not supported, so it can only take this unwise
var regexp_function_temp=/<script[^>]*> ([\s\s]*?) <\/script[\s]*>/gi;
var matcharray_temp=str_temp.match (regexp_function_temp);
eval (regexp.$1);
}
}
}