JS的分页处理[转自phpx.com]

var nowPageUrl = window.location+'';

var nNowPage=1;

var nMaxPage=1;

function GetNoNowpageArgUrl()

{

   var pattern = /^(.*)(\#|\?|\&)nowpage=(\d*)(\&?)(.*)$/i;

   var pattern2 =/^(.*)(\#|\?)(.*)$/i

   var result = nowPageUrl.match(pattern);

   if (result!=null)

  {

nNowPage = result[3];

if (result[2] == '?' || result[2] == '#')

{

   if (result[4]=="")

  {

var newUrl = result[1]+result[2];

  } else {

var newUrl = result[1]+result[2]+result[5]+"\&";

  }

} else {

   if (result[5]=="")

  {

var newUrl = result[1]+"\&";

  } else {

var newUrl = result[1]+"\&"+result[5]+"\&";

  }

}

  } else {

var result2 = nowPageUrl.match(pattern2);

if (result2==null)

{

   var newUrl = nowPageUrl + "\?";

} else {

   if (result2[3]=="")

  {

var newUrl = result2[1]+result2[2];

  } else {

var newUrl = result2[1]+result2[2]+result2[3] + "\&";

  }

}

  }

   return newUrl;

}

var nNewUrl = GetNoNowpageArgUrl();

function jump(nStart)

{

nStart = nStart-1+1;

if (!nStart || nStart==NaN || nStart=="" || nStart == null) return;

if (nStart > nMaxPage) return;

if (nStart < 1) return;

if (nStart == nNowPage) return;

window.location = nNewUrl + "nowpage=" + nStart

}

function upPage()

{

if (nNowPage<=1) return;

var nStart=nNowPage-1;

jump(nStart);

}

function downPage()

{

if (nNowPage>=nMaxPage) return;

var nStart=nNowPage-1+2;

jump(nStart);

}

function firstPage()

{

if (nNowPage<=1) return;

var nStart=1;

jump(nStart);

}

function lastPage()

{

if (nNowPage>=nMaxPage) return;

var nStart=nMaxPage;

jump(nStart);

}

function writeCleftPage(nMaxNumber,nPageNumber,nStyle)

{

   if (nPageNumber==0 || nPageNumber==null)

  {

nPageNumber = 1;

  }

  

   nMaxPage = Math.ceil( nMaxNumber / nPageNumber );

   var nStartNumber = nNowPage*nPageNumber-nPageNumber+1;

   if (nNowPage==nMaxPage)

  {

var nOverNumber = nMaxNumber;

  } else {

var nOverNumber = nNowPage*nPageNumber;

  }

   var writeStr = GetCleftPage(nMaxNumber,nPageNumber,nNowPage,nMaxPage,nStartNumber,nOverNumber,nStyle);

   document.writeln(writeStr);

}

function GetCleftPageStyle(s)

{

   var style = new Array();

   style[0] = '<style type="text/css">'

  + '<!--'

  + '.cleft_tableborder { background: #D6E0EF; border: 1px solid #698CC3 } '

  + '.cleft_smalltxt { font: 12px Tahoma, Verdana }'

  + '.cleft_header { font: 12px Tahoma, Verdana; color: #FFFFFF; font-weight: bold; background-color: #698CC3 }'

  + '.cleft_jump { text-decoration: none; font: 12px Webdings; color: #006699; cursor: hand;}'

  + '.cleft_link { text-decoration: none; font: 12px; color: #006699; cursor: hand;}'

  + '.cleft_input {border: 1px solid #698CC3}'

  + '-->'

  + '</style>';

   style[1] = '<style type="text/css">'

  + '<!--'

  + '.cleft_tableborder { background: #cccccc; border: 1px solid #999999 } '

  + '.cleft_smalltxt { font: 12px Tahoma, Verdana }'

  + '.cleft_header { font: 12px Tahoma, Verdana; color: #FFFFFF; font-weight: bold; background-color: #AFAFAF}'

  + '.cleft_jump { text-decoration: none; font: 12px Webdings; color: #773300; cursor: hand;}'

  + '.cleft_link { text-decoration: none; font: 12px; color: #773300; cursor: hand;}'

  + '.cleft_input {border: 1px solid #999999}'

  + '-->'

  + '</style>';

   s = style[s] ? s : 0 ;

   return style[s];

}

function GetCleftPage(nMaxNumber,nPageNumber,nNowPage,nMaxPage,nStartNumber,nOverNumber,nStyle)

{

   var style = GetCleftPageStyle(nStyle)

   var nEchoString = '<table cellspacing="0" cellpadding="0" border="0"><tr><td height="3"></td></tr><tr><td>'

  + '<table cellspacing="1" cellpadding="2" class="cleft_tableborder"><tr bgcolor="#F8F8F8" class="cleft_smalltxt">'

  + '<td class="cleft_header"> ' + nMaxNumber + ' </td>'

  + '<td class="cleft_header"> ' + nNowPage + '/' + nMaxPage +' </td>';

  

   var nBeginPage = nNowPage-3;

   if (nBeginPage < 1)

  {

nBeginPage = 1;

  }

  

   var nEndPage = nBeginPage+6;

   if (nEndPage > nMaxPage)

{

   nEndPage = nMaxPage;

}

   nBeginPage = nEndPage-6;

   if (nBeginPage < 1)

  {

nBeginPage = 1;

  }

   for (var j = nBeginPage; j <= nEndPage ; j++)

{

   if (j == nBeginPage && nBeginPage != 1)

  {

nEchoString += '<td align="center" onmouseover="this.bgColor=\'#D6E0EF\'" onmouseout="this.bgColor=\'#F8F8F8\'" onclick="firstPage()" class="cleft_jump"> 9 </td>'

nEchoString += '<td align="center" onmouseover="this.bgColor=\'#D6E0EF\'" onmouseout="this.bgColor=\'#F8F8F8\'" onclick="upPage()" class="cleft_jump"> 7 </td>'

  }

   if (j == nNowPage)

  {

nEchoString += '<td bgcolor="#FFFFFF" align="center"> <b>' + j + '</b> </td>'

  } else {

nEchoString += '<td align="center" onmouseover="this.bgColor=\'#D6E0EF\'" onmouseout="this.bgColor=\'#F8F8F8\'" style="cursor: hand;" onclick="jump(\'' + j + '\')" class="cleft_link"> ' + j + ' </td>'

  }

   if (j == nEndPage && nEndPage != nMaxPage)

  {

nEchoString += '<td align="center" onmouseover="this.bgColor=\'#D6E0EF\'" onmouseout="this.bgColor=\'#F8F8F8\'" onclick="downPage()" class="cleft_jump"> 8 </td>'

nEchoString += '<td align="center" onmouseover="this.bgColor=\'#D6E0EF\'" onmouseout="this.bgColor=\'#F8F8F8\'" onclick="lastPage()" class="cleft_jump"> : </td>'

  }

}

  

   nEchoString += '<td style="padding: 0">'

  + '<input type="text" name="custompage" size="3" class="cleft_input" onKeyDown="javascript: if(window.event.keyCode == 13) jump(this.value)">'

  + '</td></tr></table>'

  + '</td></tr><tr><td height="3">'

  + '</td></tr></table>';

  

   return style + nEchoString;

}