// JavaScript Document

/*
 +----------------------------------------------------------------------+
 | FONT SIZER - mit drei Stufen                                         |
 +----------------------------------------------------------------------+
*/

var spEmStepWidth 	= 0.125;	// increase/decrease font every step by spEmStepWidth
var spEmBasis 		= 0.875;		// font size of spArticleBody at startup
//var spEmBasis 		= 1;		// font size of spArticleBody at startup
var spEmStep 		= -1;		// counter for current step (leave as 0)
var spEmMaxSteps 	= 1;		// maximum steps alowed
/**

* spFontSizer increase/decrease font size inside "spEmStep"
*
* use: spFontSizer(1, false), spFontSizer(-1, false) or spFontSizer(0, true)
* @param spInc set to 1 or -1
* @param spReset set to true to get initial font size
*/
function spFontSizer(spInc, spReset) {
// reset font size
if (spReset)
spEmStep = -1;
// inside allowed steps?
if (Math.abs(spEmStep + spInc) <= spEmMaxSteps) {
// increase/decrease spEmStep
spEmStep += spInc;
// set new font size for every tag inside "spEmStep"
spEmFontSize = spEmStep * spEmStepWidth + spEmBasis;
//get spArticleBody
spEmBody = document.getElementById('spMainContent');
//		spEmBody = document.getElementsByTagName('body')[0];
// set new fot size
spEmBody.style.fontSize = spEmFontSize + "em";
}
if (spEmStep == -spEmMaxSteps) {
document.getElementById("spFontsizeMinus").src = "images/minus_over.jpg";
}
else if (spEmStep == spEmMaxSteps) {
document.getElementById("spFontsizePlus").src = "images/plus_over.jpg";
}
else {
document.getElementById("spFontsizePlus").src = "images/plus.jpg";
document.getElementById("spFontsizeMinus").src = "images/minus.jpg";
}
}