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Use js to implement ajax without refreshing and modifying the image title and description

Source: Internet
Author: User
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Reference content is as follows:
Use js to implement the front-end code of the image title and description without refreshing ajax; an html file with the following content: <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>
<Title> ajax modification </title>
<Script language = "javascript">
// IE support
If (window. ActiveXObject &&! Window. XMLHttpRequest ){
Window. XMLHttpRequest = function (){
Return new ActiveXObject (navigator. userAgent. toLowerCase (). indexOf ('msie 5 ')! =-1 )? 'Microsoft. xmlhttp': 'msxml2. xmlhttp ');
};
} // Modify the description
Function update (photoID, descvalue ){
Var req = new XMLHttpRequest ();
If (req ){
Req. onreadystatechange = function (){
If (req. readyState = 4 & req. status = 200 ){
If (req. responseText! = "") Alert (req. responseText );}
}
}
Var act = document. getElementById ("path"). value + "/AjaxCtrl ";
Req. open ('post', act );
Req. setRequestHeader ('content-type', 'application/x-www-form-urlencoded ');
Req. send ("page = UpdatePhotoDescPage & photoID =" + photo_id + "& desc =" + descvalue );
} Function initDesc (photoID ){
Var desc = document. getElementById ("txto ");
Desc. onclick = "";
Desc. onmouseover = "";
Var str = document. getElementById ('hid '). value;
If (str = "click to add photo description") str = "";
Desc. innerHTML = "<textarea id = 'txt 'class = 'highlight' style = 'margin-top: 0px; font-size: 14px; margin-bottom: 0px; width: 820px 'rows = '5'> "+ str. replace (/<br>/g ,'') + "</textarea> <br> <input type = 'button 'value =' Save 'onclick = 'getvalue (" + photoID + "); '/> & nbsp; & nbsp; <input type = 'button 'value = 'cancel 'onclick = 'resetdeschtml ("+ photoID +");'/> ";
} Function getvalue (photoID ){
Desctxt = document. getElementById ("txt ");
Var desc = document. getElementById ("txto ");
Var descvalue = desctxt. value. replace (/(^ \ s *) | (\ s * $)/g ,'');
Var str = descvalue;
If (str. length> 2000 ){
Alert ("the description can contain up to 2000 Chinese characters! Enter again. ");
Return;
}
Desc. innerHTML = "saving ...... ";
If (str = ''){
Update (photoID ,'');
Document. getElementById ('hid '). value = '';
Desc. innerHTML = "<div id = 'SP 'onclick = 'initdesc (" + photoID + "); 'style = 'width: 320px 'onmouseover = 'ch (this ); 'onmouseout = 'res (this); '> <I style = 'color: #888; width: 240px'> click to add image description </I> </div> ";
} Else {
Update (photoID, str );
Document. getElementById ('hid '). value = descvalue;
Desc. innerHTML = "<div id = 'SP 'onclick = 'initdesc (" + photoID + "); 'style = 'width: 320px; word-wrap: break-word; 'onmouseover = 'ch (this); 'onmouseout = 'res (this); '> "+ filtertxtd (document. getElementById ('hid '). value) + "</div> ";
}
} Function resetDescHTML (photoID ){
Var desc = document. getElementById ("txto ");
If (document. getElementById ('hid '). value = ''| document. getElementById ('hid'). value = 'click to add photo description '){
Desc. innerHTML = "<div id = 'SP 'onclick = 'initdesc (" + photoID + "); 'style = 'width: 320px 'onmouseover = 'ch (this ); 'onmouseout = 'res (this); '> <I style = 'color: #888; width: 320px 'onmouseover = 'res (this ); 'onmouseout = 'ch (this); '> click to add a photo description <I> </div> ";
} Else {
Desc. innerHTML = "<div id = 'SP 'onclick = 'initdesc (" + photoID + "); 'style = 'margin-top: 0px; font-size: 14px; margin-bottom: 0px; width: 320px; word-wrap: break-word; 'onmouseover = 'ch (this); 'onmouseout = 'res (this ); '> "+ filtertxtd (document. getElementById ('hid '). value) + "</div> ";
}
} // Modify the title
Function updateTit (photoID, titvalue ){
Var req = new XMLHttpRequest ();
If (req ){
Req. onreadystatechange = function (){
If (req. readyState = 4 & req. status = 200 ){
If (req. responseText! = "") Alert (req. responseText );}
}
}
Var act = document. getElementById ("path"). value + "/AjaxCtrl ";
Req. open ('post', act );
Req. setRequestHeader ('content-type', 'application/x-www-form-urlencoded ');
Req. send ("page = UpdatePhotoTitlePage & photoID =" + photo_id + "& title =" + titvalue );
} Function initTit (photoID ){
Var tit = document. getElementById ("tit ");
Tit. onclick = "";
Tit. onmouseover = "";
Var str = document. getElementById ('hidtit'). value;
If (str = "click to add a photo name") str = "";
Tit. innerHTML = "<input type = 'text' id = 'txttit' class = 'highlight' style = 'margin-top: 0px; font-size: 14px; margin-bottom: 0px; width: 320px 'value = '"
+ Str + "'maxlength = '50'/> <br> <input type = 'button 'value = 'Save 'onclick = 'gettit (" + photoID + "); '/> & nbsp; <input type = 'button' value = 'cancel 'onclick = 'resettithtml ("+ photoID +");'/> ";
} Function getTit (photoID ){
Var txtTit = document. getElementById ("txtTit ");
Var tit = document. getElementById ("tit ");
Var titvalue = txtTit. value. replace (/(^ \ s *) | (\ s * $)/g ,'');
Tit. innerHTML = "saving ...... ";
If (titvalue = ''){
UpdateTit (photoID ,'');
Document. getElementById ("hidTit"). value = '';
Tit. innerHTML = "<div id = 'SP 'onclick = 'inittit (" + photoID + "); 'style = 'width: 320px 'onmouseover = 'ch (this ); 'onmouseout = 'res (this); '> <I style = 'color: #888'> click to add a photo name </I> </div> ";
} Else {
UpdateTit (photoID, titvalue );
Document. getElementById ("hidTit" + idx). value = filtertxtd (titvalue );
Tit. innerHTML = "<div id = 'SP 'onclick = 'inittit (" + photoID + "); 'style = 'width: 320px 'onmouseover = 'ch (this ); 'onmouseout = 'res (this); '>

}
} Function resetTitHTML (photoID ){
Var tit = document. getElementById ("tit ");
If (document. getElementById ('hidtit'). value = ''| document. getElementById ('hidtit'). value = 'click to add photo name '){
Tit. innerHTML = "<I style = 'color: #888 'onclick = 'inittit (" + photoID + "); 'onmouseover = 'ch (this ); 'onmouseout = 'res (this); '> click to add a photo name </I> ";
Tit. onmouseover = "ch (this );";
} Else {
Tit. innerHTML = "<div id = 'SP 'onclick = 'inittit (" + photoID + "); 'onmouseover = 'ch (this); 'onmouseout = 'res (this ); 'style = 'width: 320px; word-wrap: break-word; '>

}
} Function ch (activeX ){
ActiveX. style. background = "# ffc ";
} Function res (activeX ){
ActiveX. style. background = "# fff ";
} Function filtertxtd (str ){
Var filterStr = str. replace (/(^ \ s *) | (\ s * $)/g ,''). replace (/</g, "& lt ;"). replace (/>/g, "& gt ;"). replace (/\ n/g, "<br> ");
Return filterStr;
}
</Script>
</Head> <body>
<Input type = "hidden" id = "hidTit" value = "click to add a photo name"/>
<Div title = "click to modify the photo name" id = "tit" onclick = "initTit ('1');" onmouseover = "ch (this ); "onmouseout =" res (this); "style =" width: 320px; word-wrap: break-word; ">
<I style = "color: #888;"> click to add a photo name </I>
</Div>
<Br/>
<Div> <div title = "click to modify the photo description" id = "txto" style = "width: 820px; word-wrap: break-word; "onclick =" initDesc ('1'); "onmouseover =" ch (this); "onmouseout =" res (this); "> <I style =" color: #888; "> click to add a photo description" </I> </div>
</Div>
<Input type = "hidden" id = "hid" value = "click to add a photo description"/>
</Div>
</Div>
</Body>
</Html>


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