Solve the Problem of page browser backward forward and page refresh functions with Ajax requests based on Jquery _ jquery

Source: Internet
Author: User
I worked on several part-time jobs and made an ajax request when I completed the page. When the browser is refreshed, the forward button becomes invalid. As a result, google. Jquery. history. js plug-in to be used
On the shoulders of giants, the following steps forward and backward are completed based on plug-ins!
I worked on several part-time jobs and made an ajax request when I completed the page. When the browser is refreshed, the forward button becomes invalid. As a result, google. Some solutions are found. One of the jquery. hashchange. js plug-ins sometimes becomes invalid, sometimes causing multiple page requests.
In another plug-in test, it perfectly meets my requirements.
The general idea is to add a parameter to the url. All work is done based on this parameter.

The Code is as follows:


// Intercept the required string for the first occurrence of the input string. Content Between fieldName + tag and endTag
Function getQueryString (url, fieldName, tag, endTag ){
Var urlString = url; // document. location. href;
If (urlString! = Null ){
Var typeQu = fieldName + tag;
Var urlEnd = urlString. indexOf (typeQu );
If (urlEnd! =-1 ){
Var paramsUrl = urlString. substring (urlEnd + typeQu. length );
Var isEnd = paramsUrl. indexOf (endTag );
If (isEnd! =-1) {return paramsUrl. substring (0, isEnd );}
Else {return paramsUrl ;}
}
Else {return null ;}
}
Else {return null ;}
}
// Set the default page
Function setDefaultPage (){
$ ("# Contul ul" ).html ("");
$ ("# Contul"). hide ();
$ ("# Cont"). show ();
$ ("# Top span"). find ("a"). removeClass ("active ");
$ ("# Top span: eq (0)"). find ("a"). addClass ("active ");
}
// Check final characters
Function checkCode (getParme ){
If (getParme! = Null ){
GetParme = getParme. toUpperCase ();
Var codeNum = getParme. charCodeAt (0)
}
If (codeNum> = 65 & codeNum <= 91 ){
$ ("# Top span"). find ("a"). removeClass ("active ");
// Alert (codeNum-64 ));
$ ("# Top span: eq (" + (codeNum-64) + ")"). find ("a"). addClass ("active ");
// $ ("# Cont" ).html ("");
$ ("# Cont"). hide ();
$ ("# Contul"). find ("ul" ).html ("");
RunAjaxGetCode (getParme );
} Else {
Setdefapage page ();
}
}
// Perform ajax operations
Function runAjaxGetCode (getParme ){
// $ ("# Cont"). fadeOut ('quick', function (){
$. Ajax ({
Cache: false,
Type: 'get ',
Url: 'sxml/searchbyword' + getParme + '. xml ',
BeforeSend: function (XMLHttpRequest ){
$ ('

Loading data. Please wait.

')
. InsertBefore ($ ("# cont "))
. FadeIn ('slow ');
},
Success: function (data, textStatus ){
$ ("# Contul"). show (). find ("ul" ).html ("");
$ (". Quick-alert"). fadeOut ('low', function (){
$ (This). remove ();
$ ("Item", data). each (function (I, domEle ){
$ ("# Contul ul"). append ("
  • "+ GetParme +": "+ $ (domEle). children (" title "). text () +"
  • ");
    If ($ (this). index ()-6) % 6 = 0 ){
    $ ("# Contul ul"). append ("

    ");
    }
    });
    });
    },
    Error: function (){
    Alert ("sorry, data acquisition failed. Please refresh the page F5 and try again \ if the problem persists, contact the website administrator. ");
    }
    });
    //});
    }
    // Obtain parameters
    Function getParmeter (){
    GetParme = getQueryString (urlParem, '# javascript = tagCode ("','','")');
    CheckCode (getParme );
    }
    // GetParmeter ();
    // Click to trigger
    $ ("# Top span: gt (0)"). click (function (){
    $ (". Quick-alert"). remove ();
    });
    // Initialization
    $. History. init (function (url ){
    // Load (url = ""? "1": url );
    If (url. length> 0 ){
    GetParme = getQueryString (url, 'javascript = tagCode ("','','")');
    If (getParme! = Null ){
    GetParme = getParme. toUpperCase ();
    CheckCode (getParme );
    }
    }
    Else {
    Setdefapage page ();
    }
    });
    // Other operations on the page
    Var getParme;
    // Function getHash (){
    // Var curHash = location. hash;
    // Alert (curHash );
    //}
    Var urlParem;
    UrlParem = document. location. href;
    Var topHtml;
    Var topHtmlLink = "";
    Var $ _ objTop;
    $ _ ObjTop = $ ("# top ")
    Tophtml1_pai_objtop.html ();
    For (var I = 65; I <91; I ++)
    {
    TopHtmlLink + = "" + String. fromCharCode (I) + "";
    }
    Pai_objtop.html (topHtml + topHtmlLink );


    Jquery. history. js plugin Demos
    Some demos are available here and have ded in the repository.
    And this site itself is built on the plugin:

    The Code is as follows:


    (Function ($ ){
    Var origContent = "";
    Function loadContent (hash ){
    If (hash! = ""){
    If (origContent = ""){
    OrigContent = Response ('{content'}.html ();
    }
    $ ('# Content'). load (hash + ". html ",
    Function () {prettyPrint ();});
    } Else if (origContent! = ""){
    Certificate ('{content'{.html (origContent );
    }
    }
    $ (Document). ready (function (){
    $. History. init (loadContent );
    $ ('# Navigation A'). click (function (e ){
    Var url = $ (this). attr ('href ');
    Url = url. replace (/^ .*#/,'');
    $. History. load (url );
    Return false;
    });
    });
    }) (JQuery );

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