First question.
Write a method to find the byte length of a string
Second question
How to control line wrapping in alert
Question number three.
Explain document.getElementById ("ElementID"). Style.fontsize= "1.5em"
Question fourth.
Separate the effects in a similar diagram into CSS and HTML
Question fifth.
In accordance with the format XXXX xx month xx days xx, xx seconds dynamic display time requirements less than 10 of the 0
Question sixth.
Write a method to remove the repeating element of an array
Question seventh.
Say 3 more scripting compatibility issues with FF and IE
Question eighth.
Write a simple Ajax example as required simple and meaningless.
Answer
First question code:
<script language= "javascript" type= "Text/javascript" > New function (s) {if (!arguments.length| |! s) return null; if ("" ==s) return 0; var l=0; for (Var i=0;i<s.length;i++) {if (S.charcodeat (i) >255) l+=2; else l++; Alert (l); (Hello, I'm good, everybody!) World! "); </script>
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
Question number two: line wrapping in alert \ n
<script language= "javascript" type= "Text/javascript" > Alert ("Hello\nworld"); </script>
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
The third question: EM is a relative unit.
I will not do the fourth question.
Question Fifth code:
<script language= "javascript" type= "Text/javascript" > New function () {with (New Date ()) {var t =function (a) {return a<10? " 0 "+A:A;} Alert (getFullYear () + "year" +t (GetMonth () +1) + "Month" +t (GetDate ()) + "Day" +t (GetHours ()) + "Time" +t (getminutes ()) + "Min" +t ( Getseconds ()) + "seconds"); }} </script>
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
Question Sixth code:
<script language= "javascript" type= "Text/javascript" > Array.prototype.strip=function () {if (this.length<2) return [this[0]]| | []; var arr=[]; for (Var i=0;i<this.length;i++) {Arr.push (This.splice (i--, 1)); for (Var j=0;j<this.length;j++) {if (this[j]==arr[arr.length-1]) {T His.splice (J--, 1); }} return arr; var arr=["abc", "abc", "85,8,8,1,2,5,4,7,8"; Alert (Arr.strip ()); </script>
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
Question seventh: Agree Winter, another: IE have children,ff no, ie have parentelement,ff no, ie have innertext,outertext,outerhtml,ff not; FF has htmlelement, Htmldivelement,xmldocument,documentfragment,node,event,element and so on, ie did not have data island, FF did not, IE and FF to create a HttpRequest instance of the same method. Wait a minute..
Question Eighth code:
<ptml> <pead><title>loading</title></pead> <body> <div id= "Load" > data is loading ......</div> <script type= "Text/javascript" > var browser={/** Browser object is used to detect browsers, which use the conditional compilation of IE *//////* @cc_on isie:true, @*/isFF:window.navigator.appName.toUpperCase () indexOf ("NETSCAPE")!=-1?true:fa LSE, IsOpera:window.navigator.appName.toUpperCase (). IndexOf ("OPERA")!=-1?true:false}; Function.prototype.bind=function (object) {var _this=this; return function () {_this.apply (object,arguments); }} function HttpRequest () {this.async=true; This.cache=false; This.xmlhttp=function () {if (Browser.isff&&window). XMLHttpRequest) {try{return new XMLHttpRequest (); }catch (e) {}} else if (Browser.isie&&window. ActiveXObject) {var Version = ["MSXML2. xmlhttp.6.0 "," msxml2.xmlhttp.5.0 "," msxml2.xmlhttp.4.0 "," msxml2.xmlhttp.3.0 "," msxml2.xmlhttp.2.6 "," Ms XML2. XMLHTTP "," microsoft.xmlhttp.1.0 "," MICROSOFT.XMLHTTP.1 "," Microsoft.XMLHTTP "]; for (Var i=0;i<version.length;i++) {try{return new ActiveX Object (Version[i]); }catch (e) {}}}} () | | False } httprequest.prototype={send:function (object,url,callback) {if (!this.xmlhttp) return; This.xmlhttp.open (object?) Post ": Get", url,!! This.async); if (object) This.xmlhttp.setRequestHeader ("Content-type", "application/x-www-form-urlencoded"); if (!this.cache) {This.xmlhttp.setRequestHeader ("No-cache", "1"); This.xmlhttp.setRequestHeader ("Pragma", "No-cache"); This.xmlhttp.setRequestHeader ("Cache-control", "No-cache"); This.xmLhttp.setrequestheader ("Expire", "0"); This.xmlhttp.setRequestHeader ("Last-modified", "Wed, 1 1997 00:00:00 GMT"); This.xmlhttp.setRequestHeader ("If-modified-since", "-1"); } if (!this.callback) This.callback=callback; if (!this.async) {if (typeof (this.callback) = = "string") {eval (this.call back); else if (typeof (this.callback) = = "function") {This.callback (this.xmlhttp); } else {this.xmlhttp.onreadystatechange=function () { if (this.xmlhttp.readystate==4) {if (this.xmlhttp.status==0| | this.xmlhttp.status==200) {if (typeof (this.callback) = = "string") {eval (this.callback); } else if (typeof (this.callback) = = "function") {This.callback ( This.xmlhttp); }}}.bind (this); } this.xmlhttp.send (object); }, Abort:function () {if (This.xmlhttp&&this.xmlhttp.abort) This.xmlhttp.abort (); } }; The Ajax class definition ends the new HttpRequest (). Send (NULL, "http://bbs.51js.com/index.php", function (r) {document.getElementById ("Load"). Innerhtml=r.responsetext.match (//img). Join (""); }); </script> </body> </ptml>
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
That's serious. The first question function defines the best parenthesis
It seems that only the expression can be without parentheses (want to show: P)
Another eighth, you're exaggerating, that's probably it.
Oxmlhttprequest=new XMLHttpRequest ();
Oxmlhttprequest.open ("Post", "/xxx.php", True)
Oxmlhttprequest.onreadystatechange=function ()
{
if (oxmlhttprequest.readystate!=4) continue;
alert (Oxmlhttprequest.responsetext);
Oxmlhttprequest.onreadystatechange=null;
Oxmlhttprequest=null;
}
Oxmlhttprequest.send ("Domain=baidu");
