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Ajax for personalized Web Page Layout

Source: Internet
Author: User
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Page for implementation:

<HTML>
<Head>
<Title> drag the DIV </title>
<Style>
* {Font-size: 12px}
. Dragtable {
Font-size: 12px;
Border-top: 1px solid # 3366cc;
Margin-bottom: 10px;
Width: 100%;
Background-color: # ffffff;
}
. Dragtr {
Cursor: move;
Color: # 7787cc;
Background-color: # e5eef9;
}
TD {vertical-align: Top ;}
# Parenttable {
Border-collapse: collapse;
Letter-Spacing: 25px;
}
</Style>
<SCRIPT src = "XMLHTTP. js" Language = "JavaScript" type = "text/JavaScript"> </SCRIPT>
<SCRIPT defer>
VaR draged = false;
Tdiv = NULL;
Function dragstart (){
Ao = event. srcelement;
If (AO. tagname = "TD") | (AO. tagname = "TR") Ao = ao. offsetparent;
Else return;
Draged = true;
Tdiv = Document. createelement ("Div ");
Tdiv. innerhtml = ao. outerhtml;
Tdiv. style. Display = "Block ";
Tdiv. style. Position = "absolute ";
Tdiv. style. Filter = "alpha (opacity = 70 )";
Tdiv. style. cursor = "move ";
Tdiv. style. width = ao. offsetwidth;
Tdiv. style. Height = ao. offsetheight;
Tdiv. style. Top = getinfo (AO). Top;
Tdiv. style. Left = getinfo (AO). Left;
Document. Body. appendchild (tdiv );
Lastx = event. clientx;
Lasty = event. clienty;
Lastleft = tdiv. style. Left;
Lasttop = tdiv. style. Top;
Try {
AO. dragdrop ();
} Catch (e ){}
}
Function draging () {// important: determine the location of the mouse
If (! Draged) return;
VaR Tx = event. clientx;
VaR ty = event. clienty;
Tdiv. style. Left = parseint (lastleft) + Tx-lastx;
Tdiv. style. Top = parseint (lasttop) + ty-lasty;
For (VAR I = 0; I <parenttable. cells. length; I ++ ){
VaR parentcell = getinfo (parenttable. cells [I]);
If (TX> = parentcell. Left & TX <= parentcell. Right & ty> = parentcell. Top & ty <= parentcell. Bottom ){
VaR subtables = parenttable. cells [I]. getelementsbytagname ("table ");
If (subtables. Length = 0 ){
If (TX> = parentcell. Left & TX <= parentcell. Right & ty> = parentcell. Top & ty <= parentcell. Bottom ){
Parenttable. cells [I]. appendchild (AO );
}
Break;
}
For (var j = 0; j <subtables. length; j ++ ){
VaR subtable = getinfo (subtables [J]);
If (TX> = subtable. Left & TX <= subtable. Right & ty> = subtable. Top & ty <= subtable. Bottom ){
Parenttable. cells [I]. insertbefore (Ao, subtables [J]);
Break;
} Else {
Parenttable. cells [I]. appendchild (AO );
}
}
}
}
}

Function dragend (){
If (! Draged) return;
Draged = false;
Mm = ff (150,15 );
}
Function getinfo (o) {// get coordinates
VaR to = new object ();
To. Left = to. Right = to. Top = to. Bottom = 0;
VaR twidth = O. offsetwidth;
VaR theight = O. offsetheight;
While (o! = Document. Body ){
To. Left + = O. offsetleft;
To. Top + = O. offsettop;
O = O. offsetparent;
}
To. Right = to. Left + twidth;
To. Bottom = to. Top + theight;
Return;
}
Function ff (AA, AB) {// from the Google website, used to restore the location
VaR AC = parseint (getinfo (tdiv). Left );
VaR ad = parseint (getinfo (tdiv). Top );
VaR AE = (Ac-getinfo (AO). Left)/AB;
VaR AF = (Ad-getinfo (AO). Top)/AB;
Return setinterval (function () {If (AB <1 ){
Clearinterval (mm );
Tdiv. removenode (true );
Ao = NULL;
Return
}
AB --;
Ac-= AE;
Ad-= AF;
Tdiv. style. Left = parseint (AC) + "PX ";
Tdiv. style. Top = parseint (AD) + "PX"
}
, AA/AB)
}
Function inint () {// Initialization
For (VAR I = 0; I <parenttable. cells. length; I ++ ){
VaR subtables = parenttable. cells [I]. getelementsbytagname ("table ");
For (var j = 0; j <subtables. length; j ++ ){
If (subtables [J]. classname! = "Dragtable") break;
Subtables [J]. Rows [0]. classname = "dragtr ";
Subtables [J]. Rows [0]. attachevent ("onmousedown", dragstart );
Subtables [J]. attachevent ("ondrag", draging );
Subtables [J]. attachevent ("ondragend", dragend );
}
}
}
Inint ();

</SCRIPT>

</Head>
<Body>
<Table border = "0" cellpadding = "0" cellspacing = "10" width = "100%" Height = 500 id = "parenttable">
<Tr>
& Lt; TD width = "25%" valgin = "TOP" & gt;
<Table border = 0 class = "dragtable" cellspacing = "0">
<Tr>
<TD> Ajax </TD>
</Tr>
<Tr>
<TD id = "div4"> </TD>
<Tr>
</Table>
<Table border = 0 class = "dragtable" cellspacing = "0">
<Tr>
<TD> DataGrid </TD>
</Tr>
<Tr>
<TD id = "div5"> </TD>
<Tr>
</Table>
<Table border = 0 class = "dragtable" cellspacing = "0">
<Tr>
<TD> Asp.net </TD>
</Tr>
<Tr>
<TD id = "div3"> </TD>
<Tr>
</Table> </TD>
& Lt; TD width = "25%" & gt;
<Table border = 0 class = "dragtable" cellspacing = "0">
<Tr>
<TD> C #. Net </TD>
</Tr>
<Tr>
<TD id = "div2"> </TD>
<Tr>
</Table> </TD>
& Lt; TD width = "25%" & gt;
<Table border = 0 class = "dragtable" cellspacing = "0" id = "td3">
<Tr>
<TD> expose Crip </TD>
</Tr>
<Tr>
<TD id = "DV"> <Div id = "div10"> </div> </TD>
<Tr>
</Table>
</TD>
</Tr>
</Table>

</Body>
</Html>

Js xmlhttp. js called on the page

// JavaScript document
Function echo (obj1, HTML)
{
$ (Obj1). innerhtml = HTML;
}
Function $ (ID)
{
Return document. getelementbyid (ID );
}
VaR XMLHTTP;
Function createxmlhttprequest (){
If (window. activexobject ){
XMLHTTP = new activexobject ("Microsoft. XMLHTTP ");
}
Else if (window. XMLHttpRequest ){
XMLHTTP = new XMLHttpRequest ();
}
}
Function parseresults (obj1 ){
VaR Results = XMLHTTP. responsexml;
VaR item = NULL;
VaR title;
VaR items = results. getelementsbytagname ("item ");
For (VAR I = 0; I <items. length; I ++ ){
Item = items [I];
Title = item. getelementsbytagname ("title") [0]. firstchild. nodevalue;
// Clearpreviusresults ();
Link2 = item. getelementsbytagname ("Link") [0]. firstchild. nodevalue;
Title = STR (title );
Addlistrow (title, link2, obj1 );
}
}

Function readrss (URL, OBJ)
{

Createxmlhttprequest ()
XMLHTTP. onreadystatechange = handlestatechange;
XMLHTTP. Open ("get", URL, true );
XMLHTTP. Send (null );
// XMLHTTP. Abort ();
Function handlestatechange ()
{
If (XMLHTTP. readystate = 2)
{
Echo (OBJ, "submitting data. Please wait ......");

}
Else if (XMLHTTP. readystate = 4)
{
If (XMLHTTP. Status = 200)
{
// Echo (OBJ, "submitting data. Please wait ......");
Clearpreviusresults (OBJ );
Parseresults (OBJ );

}
}
}
}

Function addlistrow (test, link1, obj2)
{
// Clearpreviusresults (obj2 );
$(Obj2 ). innerhtml + = '<a href = "' + link1 + '" target = "_ blank">' + test + '</a> <br> ';

}
Function STR (stri)
{
VaR strb;
If (stri. length> 30)
{
Strb = stri. substring (0, 30) + '..';
}
Else
{
Strb = stri;
}
Return strb;
}
Function clearpreviusresults (obj3 ){

While ($ (obj3). childnodes. length> 0 ){
$ (Obj3). removechild ($ (obj3). childnodes [0]);
}
}

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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