Common JS Function Code

CopyCode The Code is as follows: // get the object
Function GetObject (objectid, top)
{
Doc = Top? Optional topics top.doc ument: document;
If (typeof (objectid )! = "Object" & typeof (objectid )! = "Function ")
{
If (Doc. getelementbyid & Doc. getelementbyid (objectid ))
{
// W3C dom
Return Doc. getelementbyid (objectid );
}
Else if (Doc. getelementsbyname (objectid ))
{
Return Doc. getelementsbyname (objectid) [0];
}
Else if (Doc. All & Doc. All (objectid ))
{
// MSIE 4 dom
Return Doc. All (objectid );
}
Else if (Doc. Layers & Doc. Layers [objectid])
{
// NN 4 Dom.. Note: This won't find nested Layers
Return Doc. Layers [objectid];
}
Else
{
Return false;
}
} Else
Return objectid;
}
// Obtain the relative path
Function getrelativepath ()
{
VaR url = location. href; // The current URL
VaR urlcs = string (location. Search );
Url = URL. Replace (urlcs ,"");
VaR Path = URL. length-URL. replace (// G ,""). length-3; // The level is the length of the URL containing/-no length of the contained/, and then the number of project headers /.

VaR STR = "";
For (VAR I = 0; I <path; I ++)
{
STR + = "../"; // returns the result of combining the string with a relative path.
}
Return STR;
}
// Load other JS files or CSS files
Function loadjscssfile (filename, filetype, chkonce)
{
Filetype =! Filetype? "JS": filetype;
VaR had = false;
If (filetype = "JS ")
{
If (chkonce)
{
VaR allscripts = Document. getelementsbytagname ("script ");
For (VAR I = 0; I <allscripts. length; I ++)
{
Try {
If (allscripts [I]. SRC. indexof (filename)>-1)
{
Had = true;
Break;
}
} Catch (e ){}
}
}
If (! Had)
{
Document. Write ("<SCRIPT src =" "+ filename +" "src =" "+ filename +" "type = 'text/JavaScript '> </SCRIPT> ");
}
} Else
{
If (chkonce)
{
VaR allcss = Document. getelementsbytagname ("Link ");
If (allcss. length)
{
For (VAR I = 0; I <allcss. length; I ++)
{
Try {
If (allcss [I]. href. indexof (filename)>-1)
{
Had = true;
Break;
}
} Catch (e ){}
}
}
}
If (! Had)
{
Document. write ("<link type = 'text/CSS 'rel = 'stylesheet' href =" "+ filename +" "href =" "+ filename +" "/> ");
}
}
}
// Define the root directory path
VaR root_path = getrelativepath ();
VaR js_path = root_path + 'js /';
VaR ajax_path = root_path + 'ajax /';
VaR css_path = root_path + 'css /';
VaR images_path = root_path + 'images /';
VaR editor_path = root_path + 'uploadeditor /';
VaR pub_path = root_path + 'uploadfile /';

// Js for loading public variables
Loadjscssfile (js_path + "globalpara. js ");

// Set an item to be selected in the drop-down list
Function setseloption (objid, vlu)
{
Objid = GetObject (objid );
For (VAR I = 0; I <objid. Options. length; I ++)
{
If (objid. Options [I]. value = vlu)
{
Objid. Options [I]. setattribute ("selected", "selected ");
Break;
}
}
}
// Set an item to be selected based on the option text in the drop-down list
Function settxtoption (objid, txt)
{
Objid = GetObject (objid );
For (VAR I = 0; I <objid. Options. length; I ++)
{
If (objid. Options [I]. innerhtml = txt)
{
Objid. Options [I]. setattribute ("selected", "selected ");
Break;
}
}
}

// Set an item in the single-choice button group to be selected
Function setselradio (objname, vlu)
{
Objname = Document. getelementsbyname (objname );
For (VAR I = 0; I <objname. length; I ++)
{
If (objname [I]. value = vlu)
{
Objname [I]. setattribute ("checked", "checked ");
Break;
}
}
}

// Select certain items in the check box based on ID
// Vlu format: 1, 2, 3
Function setselcheckbox (prefix, vlu)
{
VaR _ arr = vlu. Split (",");
If (_ Arr! = "")
{
For (VAR I = 0; I <_ arr. length; I ++)
{
GetObject (prefix + _ arr [I]). Checked = true;
}
}
}

// Quick input, fromobj: source object, toobjid: ID of the target object. If txt is true, the innerhtml value of toobjid is obtained.
Function fastinput (fromobj, toobjid, txt)
{
If (fromobj. value = ''| fromobj. value = 0) return false;
TXT =! TXT? False: txt;
VaR toobj = GetObject (toobjid );
If (txt)
{
If (typeof (toobj. Value) = 'undefined ')
Toobj. innerhtml = totxt (fromobj. Options [fromobj. selectedindex]. innerhtml );
Else
Toobj. value = totxt (fromobj. Options [fromobj. selectedindex]. innerhtml );
} Else
{
If (typeof (toobj. Value) = 'undefined ')
Toobj. innerhtml = fromobj. value;
Else
Toobj. value = fromobj. value;
}
}

/*
IE6, IE7 preview an image before uploading it
You can also check the image size in IE6.
Size in KB
<Style type = "text/CSS"> <! --

. Newpreview
{
Width: 400px; Height: 300px;
Filter: progid: DXImageTransform. Microsoft. alphaimageloader (sizingmethod = scale)
}
. Nodis {display: none ;}
--> </Style> <style type = "text/CSS" bogus = "1">
. Newpreview
{
Width: 400px; Height: 300px;
Filter: progid: DXImageTransform. Microsoft. alphaimageloader (sizingmethod = scale)
}
. Nodis {display: None ;}</style>
<Input type = "file" name = "litpic" onchange = "previewimg (this, 'newpreview', 'ndspreview', 400)"/>
<Div id = "newpreview" class = "newpreview"> </div>

*/
Function previewimg (imgfile, newpreview, ndspreview, size)
{
Newpreview = GetObject (newpreview );
If (! Imgfile |! Imgfile. Value |! Newpreview) {return };
VaR patn =/\. jpg $ | \. JPEG $ | \. gif $ | \. PNG $ | \. BMP $/I;
If (patn. Test (imgfile. Value ))
{
Try {newpreview. Filters. Item ("DXImageTransform. Microsoft. alphaimageloader"). src = imgfile. value;} catch (e ){}
If (navigator. appversion. indexof ("MSIE 6.0", 0)>-1)
{
Size =! Size? 0: size;
Ndspreview = GetObject (ndspreview );
If (ndspreview)
{
Try {ndspreview. attachevent ("onreadystatechange", function () {checkimgsize (ndspreview, size)} catch (e ){}
Ndspreview. src = imgfile. value;
}
}
}
Else
{
Alert ("You selected not an image file. Please reselect .");
}
}
Function previewimgnow (imgdiv, imgfile)
{
Try {GetObject (imgdiv). Filters. Item ("DXImageTransform. Microsoft. alphaimageloader"). src = imgfile} catch (e ){}
}
// Check the image size before uploading
// The condition is that the function is triggered when the file is changed to display the thumbnail on the IMG.
// The unit of size is kb.
Function checkimgsize (IMG, size)
{
IMG = GetObject (IMG );
If (IMG. readystate = "complete ")
{
VaR Limit = size * 1024;
If (IMG. filesize> limit)
{
Alert ("error! The size of the image you uploaded is "+ (parseint (IMG. filesize/1024) +" kb, which exceeds the "+ size +" kb limit. please upload it again ");
Return false
} Else
Return true;
}
Return true;
}
// Check the client environment
Function clientmentinfo ()
{
VaR me = this;
VaR appver = navigator. useragent;

This. getbrowsername = function (){
If (appver. indexof ("MSIE")> 0) Return "ie ";
Else if (appver. indexof ("Firefox")> 0) Return "Firefox ";
Else if (appver. indexof ("Chrome")> 0) Return "Chrome ";
Else if (appver. indexof ("safari")> 0) Return "safari ";
Else if (appver. indexof ("Camino")> 0) Return "Camino ";
Else if (appver. indexof ("Konqueror")> 0) Return "Konqueror ";
Else return "other ";
}

This. getosinfo = function (){
VaR _ pF = navigator. Platform;
If (_ pF = "Win32" | _ pF = "Windows ")
{

If (appver. indexof ("Windows NT 6.0")>-1 | appver. indexof ("Windows Vista")>-1)
{< br> return 'windows Vista ';
}else if (appver. indexof ("Windows NT 6.1")>-1 | appver. indexof ("Windows 7")>-1)
{< br> return 'windows 7 ';
}else
{< br> try {
VaR _ winname = array ('123', 'xp ', '123 ');
VaR _ ntnum = appver. match (/Windows NT 5. \ D/I ). tostring ();
return 'windows' + _ winname [_ ntnum. replace (/Windows NT 5. (\ D)/I, "$1")];
}catch (e) {return 'windows ';}
}< BR >}else if (_ pF = "mac68k" | _ pF = "macppc" | _ pF = "Macintosh ")
{< br> return "Mac";
}else if (_ pF = "X11")
{< br> return "Unix ";
} else if (string (_ pF ). indexof ("Linux")>-1)
{< br> return "Linux";
}else
{< br> return "unknow ";
}< BR >}

This. OS = me. getosinfo (); // operating system type
This. iever = NULL;
This. bs_lang = (navigator. appname = 'netscape '? Navigator. Language: navigator. browserlanguage); // browser language version
This. bs_name = me. getbrowsername (); // browser name

// Browser version
If (this. bs_name = 'ie ')
{
VaR _ MSIE = appver. Match (/MSIE \ D./I). tostring ();
This. bs_version = This. iever = _ MSIE. Replace (/MSIE (\ D)./I, "$1 ");
} Else
{
This. bs_version = appver;
}
This. IE6 = This. iever = 6? True: false;
This. IE7 = This. iever = 7? True: false;
This. IE8 = This. iever = 8? True: false;
}
// Client information
VaR cminfo = new clientmentinfo ();
// Cache the background image in IE6
If (cminfo. IE6)
{
Document.exe ccommand ("backgroundimagecache", false, true );
}
// Set all or none of the check boxes
Function setallcheckbox (formname, objname, num)
{
If (formname)
_ Arr = GetObject (formname). elements [objname];
Else
_ Arr = typeof (objname) = "object "? Objname: Document. All (objname );
If (_ ARR)
{
If (Num)
{
If (! _ Arr. Length) // if there is only one check box, length = undefined
_ Arr. Checked = true;
Else
{
For (VAR I = 0; I <_ arr. length; I ++)
{
_ Arr [I]. Checked = true;
}
}
} Else
{
If (! _ Arr. Length) // if there is only one check box, length = undefined
_ Arr. Checked = false;
Else
{
For (VAR I = 0; I <_ arr. length; I ++)
{
_ Arr [I]. Checked = false;
}
}
}
}
}

// Jump the current page to the specified page number
Function gopage (pagenum, pagestr)
{
Window. Location. href = "? NP = "+ pagenum + pagestr;
}
// Remove spaces on the left and right of the string respectively
String. Prototype. Trim = function () {return this. Replace (/^ \ s + | \ s + $/g ,"")}
String. Prototype. ltrim = function () {return this. Replace (/^ \ s +/g ,"")}
String. Prototype. rtrim = function () {return this. Replace (/\ s + $/g ,"")}

This article from the csdn blog, reproduced please indicate the source: http://blog.csdn.net/linyuanxing/archive/2008/12/01/3421058.aspx

Note that the authors of globalpara. js often use some files of common variables and constants for each station. If you do not need such files
// Js for loading public variables
Loadjscssfile (js_path + "globalpara. js ");
If you delete these two sentences, an error will be reported.
(Updated on)
Changed the clientmentinfo class to compatible with IE6, IE7, IE8, Vista, Windows 7, and Firefox.