Ajax-based page-class implementation code _AJAX related

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/**
* <p>pagination.js
* <p> Common AJAX-based paging classes
* @author Jeanwendy
* @version 1.0
*/
var paginationindex = 0;
var pagination = function (Trtemplatid) {
$ (). Ajaxstart (function () {
$.blockui ({
Message: ' <table><tr><td style= "Vertical-align:bottom" ><font size=2pt> load data, please ... </ Font></td></tr></table> '
});
}). Ajaxstop ($.unblockui);

Paginationindex = Paginationindex + 1;
This.id = Paginationindex;
This.trtemplatid = Trtemplatid;
This.pageno = 1;
This.pagesize = 10;
This.beforequery = null;
This.afterquery = null;
This.url = null;
This.params = null;
This.templat = null;
This.childrencount = null;

This.setpageno = function (PageNo) {
if (PageNo!= null)
This.pageno = PageNo;
}
This.setpagesize = function (pageSize) {
if (pageSize!= null)
This.pagesize = pageSize;
}
This.setbeforequery = function (fn) {
This.beforequery = fn;
}
This.setafterquery = function (fn) {
This.afterquery = fn;
}

this.load = function (URL, params) {
Initialize (performed only on first query)
if (This.templat = = NULL && This.childrencount = null) {
var templatobj = $ (' # ' +this.trtemplatid);
Templatobj.parent (). attr (' id ', ' tbody_id ' +this.id);
TEMPLATOBJ.REMOVEATTR (' id ');
Templatobj.wrap ("<div id= ' Divtemplat ' ></div>");
This.templat = $ (' #divTemplat '). html ();
$ (' #divTemplat '). Remove ();
This.childrencount = $ (' #tbody_id ' +this.id). Children (). Size ();
}
Start query
This.url = URL;
if (params = = null) params = {};
$.extend (Params,{pageno:this.pageno,pagesize:this.pagesize});
This.params = params;
var thisobj = this;
var options = {
Url:url,
Data:params,
Async:false,//using synchronous mode request
Type: ' POST ',
DataType: ' JSON ',
Error:function (XMLHTTP, Errinfo, E) {//Request error handling: such as: 404
if (xmlhttp.status = =) Alert (' You have not visited the site for a long time, please sign out and login again! ');
else alert (' error when requesting background service: ' + xmlhttp.status ');
},
Success:function (data) {
Delete last data
$ (' #tbody_id ' +thisobj.id). Children (). Filter (': GT (' + (thisobj.childrencount-1) + '). Remove ();
Thisobj.pagelist (Data.data);
Thisobj.pagebar (data.total);
if ($.isfunction (thisobj.afterquery)) thisobj.afterquery ();
}
};
if ($.isfunction (this.beforequery)) this.beforequery ();
$.ajax (options); Send Request
}

This.pagelist = function (data) {
var Filedarr = This.templat.match (/\{[a-za-z0-9_]+\}/ig);
for (var i = 0;i < data.length;i++) {
var thistemplat = This.templat;
for (var j = 0;j < filedarr.length;j++) {
var key = filedarr[j].substring (1,filedarr[j].length-1);
if (key = = ' No_ ') {//ordinal ID
var value = (this.pageno-1) *this.pagesize + i + 1;
Thistemplat = Thistemplat.replace (New RegExp (' \{' +key+ '} ', ' GM '), value);
}else{
var value = Data[i][key];
if (typeof (value)!= "undefined" && value = = null) value = ';
Thistemplat = Thistemplat.replace (New RegExp (' \{' +key+ '} ', ' GM '), value);
}
}
$ (Thistemplat). Appendto ($ (' #tbody_id ' +this.id));
}
}

This.pagebar = function (total) {
var templatobj = $ (This.templat);
var delchildren = Templatobj.children (': GT (0) ');
Delchildren.remove ();
Templatobj.children (). attr (' colspan ', $ (this.templat). Children (). Size ());
Templatobj.children (). attr (' Align ', ' right ');
var PageCount;
If (total% this.pagesize = = 0) PageCount = total/this.pagesize;
else PageCount = parseint (total/this.pagesize) + 1;
if (PageCount = = 0) PageCount = 1;
var toolbar = "+this.pageno+"/"+pagecount+" page ("+total+" record);
if (This.pageno = = 1) toolbar = toolbar + "First Prev";
else toolbar = toolbar + "<a href= ' id= ' firstpage" +this.id+ "' > Home </a> <a href= ' id= ' prepage ' +this.id+ ' gt; prev </a> ";
if (This.pageno = = pagecount) toolbar = toolbar + "next Page last";
else toolbar = toolbar + <a href= ' id= ' nextPage ' +this.id+ ' ' > next page </a> <a href= ' ' id= ' lastpage ' +this.id+ ' ' & gt; last </a> ";
toolbar = toolbar + "<input per page style= ' text-align:center;width:25px;height:20px;border:1 solid black ' type= ' text ' id= ' PageSize "+this.id+" "value=" +this.pagesize+ "/> Strip";
toolbar = toolbar + "<input style=" text-align:center;width:25px;height:20px;border:1 solid black ' type= ' text ' id= ' PageNo "+this.id+" "value=" +this.pageno+ "/>";
toolbar = toolbar + "<input style= ' height:20px;border:1 solid black ' id= ' gopage ' +this.id+" ' type= ' button ' value= ' Go ' & gt; ";
Templatobj.children (). HTML (toolbar);
$ (Templatobj.wrap ("<div></div>"). Parent (). HTML (). Appendto ($ (' #tbody_id ' +this.id));
var thisobj = this;
$ (' #firstPage ' +thisobj.id). Click (function () {
Thisobj.pageno = 1;
Thisobj.load (Thisobj.url,thisobj.params);
return false;
});
$ (' #prePage ' +thisobj.id). Click (function () {
Thisobj.pageno = parseint (Thisobj.pageno)-1;
Thisobj.load (Thisobj.url,thisobj.params);
return false;
});
$ (' #nextPage ' +thisobj.id). Click (function () {
Thisobj.pageno = parseint (Thisobj.pageno) + 1;
Thisobj.load (Thisobj.url,thisobj.params);
return false;
});
$ (' #lastPage ' +thisobj.id). Click (function () {
Thisobj.pageno = PageCount;
Thisobj.load (Thisobj.url,thisobj.params);
return false;
});
$ (' #pageSize ' +thisobj.id). KeyDown (function (e) {
if (e.keycode==13) {
var v = $ (' #pageSize ' +thisobj.id). Val ();
if (!isintgreatzero (v) | | | v = = ' 0 ') {
Alert (' You enter the number of display bar is not valid, please re-enter! ');
$ ("#pageSize" +thisobj.id). focus ();
Return
}
if (V > 200) {
Alert (' You enter the number of display bar too large, please re-enter! ');
$ ("#pageSize" +thisobj.id). focus ();
Return
}
Thisobj.pageno = 1;
Thisobj.pagesize = v;
Thisobj.load (Thisobj.url,thisobj.params);
}
});
$ (' #pageNo ' +thisobj.id). KeyDown (function (e) {
if (e.keycode==13) {
$ (' #goPage ' +thisobj.id). Triggerhandler (' click ');
}
});
$ (' #goPage ' +thisobj.id). Click (function () {
var v = $ (' #pageNo ' +thisobj.id). Val ();
if (!isintgreatzero (v) | | | v = = ' 0 ') {
Alert (' You enter the number of pages is not valid, please re-enter! ');
$ ("#pageNo" +thisobj.id). focus ();
Return
}
if (V > PageCount) {
Alert (' You enter more than the total number of pages, please re-enter! ');
$ ("#pageNo" +thisobj.id). focus ();
Return
}
Thisobj.pageno = v;
Thisobj.load (Thisobj.url,thisobj.params);
});
}

}
True if the string is empty
var isempty = function (text) {
var isempty = true;
for (var i = 0; i < text.length; i++) {
if (Text.charat (i)!= ') {
IsEmpty = false;
Break
}
}
return isempty;
}
True if the the string is int and great than zero or equals zero
var Isintgreatzero = function (str) {
if (IsEmpty (str))
return false;
var Temp1 = true;
var temp2 = ' 0123456789 ';
for (var i = 0; i < str.length; i++) {
var c = Str.charat (i);
if (Temp2.indexof (c) = =-1) {
Temp1 = false;
Break
} else {
if (c = = ' 0 ' && i = = 0 && str.length > 1) {
Temp1 = false;
Break
}
}
}
return TEMP1;
}