// scFontSize.js v.01.01.02 - copyright 2006-2007 Stefan Schmohl, scido.de - all rights reserved
// ######## get element by id ########
function scFzIdF( idS ) { if ( idS == "" ) return false ; var idO = document.getElementById( idS ) ;
/* if ( ! idO ) alert ( "ID \"" + idS + "\" not found !" ) ; */ return idO ; } ;
// ######## display text "aS" at id "iS" ########
function scFzTsF( aS, iS ) {
var idO = scFzIdF( iS ) ; if ( ! idO ) return false ;
var ntO = document.createTextNode( aS ) ; if ( ! ntO ) return false ;
var otO = idO.firstChild ; if ( ! otO ) return false ;
if ( ! ( idO.replaceChild( ntO, otO ) ) ) return false ;
return true ; } ;
// ######## set font size + "aN" ########
function scFzSzF( aN ) {
// #### cookie values ####
var nS = this.ckIdS + "=" ; var nN = nS.length ; // cookie variable name
dO = new Date( ) ; var dN = dO.getTime( ) + ( this.ckExN * 24 * 60 * 60 * 1000 ) ; dO.setTime( dN ) ;
var cG = ";expires=" + dO.toGMTString( ) + ";path=/;" ; // exp. in ckExN days, valid for root path
// #### if not yet defined, try to set cookie ####
if ( ! document.cookie.match( nS ) ) { // not yet defined ( or forbidden )
document.cookie = nS + this.dfFzN + cG ; // try to set default font size
if ( ! document.cookie.match( nS ) ) return false ; } ; // probably forbidden
// #### try to get the cookie value ####
var vN = document.cookie.indexOf( nS ) + nN ; // position of begin of value
if ( vN < nN ) { alert( "scFontSize bug" ) ; return false ; } ; // should never happen
var vS = document.cookie.substr( vN ) ; // substring starting with value
vN = vS.indexOf( ";" ) ; // position of end of value = length of value
if ( vN != -1 ) vS = vS.substr( 0, vN ) ; // substring with value
// #### calculate new value, set cookie, and display new font size value ####
vN = vS - 0 + aN ; document.cookie = nS + vN + cG ; scFzTsF( vN, this.nbIdS ) ;
// #### set font size of document ####
vN = vN + 0.2 ; // mozilla switches up at +0.5, ie down at -0.1 - go into the middle
var tdA = document.getElementsByTagName( "td" ) ; // array of all table cells
for ( nN = 0 ; nN < tdA.length ; nN++ ) { // iterate
tdA[ nN ].style.fontSize = vN + "px" ; } ; // set fontSize style
return true ; } ;
// ######## scFontSize object constructor ########
function ScFontSizeO( ckIdS, ckExN, dfFzN, nbIdS, dcIdS, dcTxS ) {
this.ckIdS = ckIdS ; this.ckExN = ckExN ; this.dfFzN = dfFzN, this.nbIdS = nbIdS ;
this.setF = scFzSzF ; if ( this.setF( 0 ) ) scFzTsF( dcTxS, dcIdS ) ; } ;
/* use it like this
| font size : n.a. - + | scFontSize failure |
*/