Some common JavaScript functions _javascript techniques

The project team after the company to develop a client software, software interface with the Web interface to reflect, So there's a lot of JavaScript to use. After coming to the company, the project team developed a client-side software that uses a Web interface to represent the software, so it uses a lot of JavaScript. Write some of the general JS functions of the following:

/* Judge the browser version * *
var w3c= (document.getElementById)? True:false;
var agt=navigator.useragent.tolowercase ();
var ie = ((Agt.indexof ("MSIE")!=-1) && (Agt.indexof ("opera") = = 1) && (Agt.indexof ("omniweb") = = 1));
var ie5= (&& IE)? True:false;
var ns6= (&& (navigator.appname== "Netscape")? True:false;
var op8= (Navigator.userAgent.toLowerCase (). IndexOf ("opera") ==-1)? False:true;

function Ob (o) {//Get an Object
return document.getElementById (o) document.getElementById (o): o;
}

function Issubstr (p,s) {//Determine whether to be a substring
Return (P.indexof (s) >-1);
}

function Hd (o) {//Hide an Object
Ob (o). style.display= "None";
}

function Sw (o) {//Display an Object
Ob (o). style.display= "Block";
}
function Sw2 (o) {//Display an Object
Ob (o). style.display= "";
}

function Sf (o,s,b) {
This function is used for multiple buttons to share the same form, where: O is the ID of the hidden input for the form's ID B (whose value is then judged by the user-submitted action type) s to submit the action type for the user
Ob (b). Value=s;
Ob (O). Submit ();
}

function Exchgcls (o,a,b) {//Toggle object's ClassName
o.classname=o.classname==a?b:a;
}

function exchghtml (o,a,b) {//Toggle object's innerHTML
o.innerhtml=o.innerhtml==a?b:a;
}

function Oh (o,s) {//output string to an object
Ob (o). Innerhtml=s;
}

function Setsrc (o,s) {//change the SRC value of an IMG, IFRAME, etc object
Ob (o). Src=s;
}

/*xmlhttp*/
function Gp (url,o) {//gethttppage
var o=ob (o);
var pagerequest = false;
IsLoading (o);
if (window. XMLHttpRequest) {//if Mozilla, Safari etc
Pagerequest = new XMLHttpRequest ();
}
else if (window. ActiveXObject) {//if IE
try {
Pagerequest = new ActiveXObject ("Msxml2.xmlhttp");
}
catch (e) {
try{
Pagerequest = new ActiveXObject ("Microsoft.XMLHTTP");
}
catch (e) {;}
}
}
else {return false;}
Pagerequest.onreadystatechange=function () {
if (pagerequest.readystate = = 4) {
Lp (Pagerequest,o);
}
}
Pagerequest.open (' Get ', url, true);
Pagerequest.send (NULL);
}

function Lp (pagerequest,o) {//loadpage
if (pagerequest.readystate = 4 && (pagerequest.status==200 | | window.location.href.indexOf ("http") ==-1))
Ob (o). Innerhtml=pagerequest.responsetext;
Hd ("opmsg");
}

function IsLoading (o) {
O.innerhtml= "Data loading, please wait ...";
SW2 ("opmsg");
}

Include Javascript File
function Incjs (SSRC,SID) {
var ohead = document.getElementsByTagName (' head ') [0];
var oscript = document.createelement (' script ');
Oscript.type = "Text/javascript";
OSCRIPT.SRC = SSRC;
Oscript.id = SID;
if (oscript.readystate== "loaded") {Ohead.appendchild (oscript);}
}

/*move & remove*/
function Mv (a,b,n) {
var i = 0;
var f=ob (a);
var t=ob (b);
var n=n?n:0;
if (n==0) {
for (var ii=0; ii<f.options.length; ii++) {
if (f.options[ii].selected) {
var no = new Option ();
No.value = F.options[ii].value;
No.text = F.options[ii].text;
T.options[t.options.length] = no;
}
}
}
else {
for (var ii=0; ii<f.options.length; ii++) {
if (f.options[ii].selected) {
T.value + = "," +f.options[ii].value;
}
}
}
Rv (a);
}

function Rv (o) {
var o=ob (o);
for (var ii=o.options.length-1; ii>=0; ii--) {
if (o.options[ii].selected && o.options[ii]!= "") {
O.options[ii].value = "";
O.options[ii].text = "";
O.OPTIONS[II] = null;
}
}
}

function Chginp (O1,O2) {
Ob (O2). readonly= (! Ob (O1). checked);
if (Ob (O1). Checked) {
Ob (O2). Classname= "Inptxt";
Ob (O2). focus ();
} else {
Ob (O2). Classname= "InpTxt0";
}
}

/*checkbox*/
function Dochk (o,o2,s) {
This. Oldcls = S | | "";
if (O.checked==false) {
O.parentnode.parentnode.classname=this. Oldcls;
Ob ("Btnchkall"). Checked=false;
} else {
O.parentnode.parentnode.classname= "chked";
Isallchk (o2,this. OLDCLS);
}
}

function Isallchk (o,s) {
var chknums=0;
var arrobj=ob (o). getElementsByTagName ("input");
This. Oldcls = S | | "";
for (i=0;i<arrobj.length;i++) {
if (arrobj[ii].checked) {
Chknums+=1;
Arrobj[ii].parentnode.parentnode.classname= "chked";
} else {
Arrobj[ii].parentnode.parentnode.classname=this. Oldcls;
}
}
Alert (chknums+ ":" +arrobj.length)
if (chknums==arrobj.length-1) {
Ob ("Btnchkall"). Checked=true;
} else {
Ob ("Btnchkall"). Checked=false;
}
}

function Chkall (o,o2,s) {
var arrobj=ob (O2). getElementsByTagName ("input");
This. Oldcls = S | | "";
for (ii=1;ii<arrobj.length;ii++) {
arrobj[ii].checked=o.checked;
if (o.checked) {
Arrobj[ii].parentnode.parentnode.classname= "chked";
} else {
Arrobj[ii].parentnode.parentnode.classname=this. Oldcls;
}
}
}

function Oppchk () {
var arrobj=ob ("Photos"). getElementsByTagName ("input");
for (ii=0;ii<arrobj.length;ii++) {
arrobj[ii].checked=!arrobj[ii].checked;
}
Isallchk ();
}

/*test nums*/
function Isintnum (s) {
var reintnum=/^\-?\d+$/;
return Reintnum.test (s);
}
function Isbetween (n0,n1,n2,t) {
this.comparetype=t | | 4;
Switch (this.comparetype) {
Case 0:
Return (n0>n1 && n0<n2);
Case 1:
Return (n0>=n1 && n0<n2);
Case 2:
Return (n0>n1 && n0<=n2);
Default:
Return (n0>=n1 && n0<=n2);
}
}