Javascript news title static paging code (without refreshing) _ javascript skills

A template that retrieves n records from the database and generates static data. Static Single pages, index pages are combined with Arrays Using JS.
A template that retrieves n records from the database and generates static data.
Static Single pages, index pages are combined with Arrays Using JS.
Because the record is just a title, a link, and the number of bytes is not too large,
Using js to use this large array for paging looks good and saves bandwidth!
Great, simple, practical, and recommended!
JS Code:

The Code is as follows:

Function title_array (title, link_add, store_time ){
This. title = title;
This. link_add = link_add;
This. store_time = store_time;
}
Var ii = 0;
Var item = new Array ();
Ii ++; item [ii] = new title_array ('Study endless 25', '#', '(, January 1, March 17 )');
Ii ++; item [ii] = new title_array ('Study endless 24', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 23', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('Study is endless 22', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 21', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 20', '#', '(, January 15, March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 11', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 18', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('Study endless 17', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 16', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('learning is endless 15', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 14', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('learning endless 13', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 12', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 11', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 10', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 9', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 8', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 7', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 6', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 5', '#', '(, March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 4', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('endless learning 3', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('learning is endless 2', '#', '(March 17 )');
Ii ++; item [ii] = new title_array ('learning is endless 1', '#', '(, January 1, March 17 )');
// Page to be displayed
Var currpage = 1;
// The number of information entries displayed on one page is 40.
Var pagesize = 5;
// The first page displayed for page number Maintenance
Var beginpage = 1;
// The last page displayed for page number Maintenance
Var endpages = 100;
// Display the content of a page
Function displaypage (onepage ){
If (onepage <1 ){
Alert ("arrived on the homepage ");
Return;
}
Var NumRecords;
If (item. length = 1 ){
NumRecords = item. length;
} Else {
NumRecords = item. length-1; // The total number of items. This is because the information is saved from the subscript [1.
}
// Return if no information is available
If (NumRecords <= 0 ){
Return false;
}
NumPages = Math. floor (NumRecords + (pagesize-1)/pagesize); // total number of pages
If (onepage> NumPages ){
Alert ("the last page has been reached ");
Return;
}
Currpage = onepage;
// The first line of the page
Var start = pagesize * (currpage-1) + 1;
If (NumRecords = 1 ){
Start = start-1;
}
If (start> = item. length) return;
// Load the page content
Var strText = "";
For (var I = 1; I <= pagesize/5; I ++ ){
StrText + ="

"
For (var j = 1; j <= 5; j ++ ){
If (start <item. length ){
StrText + ="
• "+ Item [start]. title +" "+ item [start]. store_time +"
";
Start ++;
}
}
StrText + ="

"
}
Document. getElementById ("title1"). innerHTML = strText;
// If the total number of pages is less than 5
If (NumPages <10 ){
Beginpage = 1;
Endpage = NumPages;
} Else {
// If the first five pages are displayed
If (currpage <= 5 & currpage> 0 ){
Beginpage = 1;
Endpage = 10;
}
// If the last five pages are displayed
If (currpage <= NumPages & currpage> (NumPages-9 )){
Beginpage = NumPages-9;
Endpage = NumPages;
}
// Other cases
If (currpage> 5 & currpage <(NumPages-9 )){
If (currpage> = (endpage + 1 )){
Beginpage + = 10;
Endpage + = 10;
}
If (currpage <= (beginpage-1 )){
Beginpage-= 10;
Endpage-= 10;
}
}
}
Var showtext = "";
If (NumPages> 0 ){
Showtext + = "<";
Showtext + = "Previous Page ";
Var currpages = currpage <NumPages-2? Currpage + 2: NumPages;
Var currpage1 = currpage <= 2? 1: currpage-2;
If (NumPages <= 10 ){
Currpage1 = 1;
Currpages = NumPages;
} Else if (currpage1> = 2 ){
Showtext + = "1 ";
If (currpage1> 2 ){
Showtext + = "...";
}
}
For (I = currpage1; I <= currpages; I ++ ){
If (currpage = (I )){
Showtext + = "" + I + "";
} Else {
Showtext + = "" + I + "";
}
}
If (NumPages> 10 & currpages <= NumPages-1 ){
If (currpages <NumPages-1 ){
Showtext + = "...";
}
Showtext + = "" + NumPages + "";
}
Showtext = showtext + "next page ";
Showtext = showtext + "> ";
}
Document. getElementById ("page1"). innerHTML = showtext;
}

Call:

The Code is as follows: