var EmStepWidth 	= 0.125;	// increase/decrease font every step by EmStepWidth
var EmBasis 		= 1.14;		// font size of ArticleBody at startup
//var spEmBasis 		= 1;		// font size of ArticleBody at startup
var EmStep 		= -1;		// counter for current step (leave as 0)
var EmMaxSteps 	= 1;		// maximum steps alowed
/**
* FontSizer increase/decrease font size inside "EmStep"
*
* use: FontSizer(1, false), FontSizer(-1, false) or FontSizer(0, true)
* @param Inc set to 1 or -1
* @param Reset set to true to get initial font size
*/
function FontSizer(Inc,Reset){
	if(Reset)
	EmStep=-1;
	if(Math.abs(EmStep+Inc)<=EmMaxSteps){
		EmStep+=Inc;
		EmFontSize=EmStep*EmStepWidth+EmBasis;
		EmBody=document.getElementById('contenttext');
		EmBody.style.fontSize=EmFontSize+"em";
	}
	if(EmStep==-EmMaxSteps){
		document.getElementById("fontsize_minus").style.backgroundPosition="bottom";
	}
	else if(EmStep==EmMaxSteps){
		document.getElementById("fontsize_plus").style.backgroundPosition="bottom";
	}
	else{
		document.getElementById("fontsize_plus").style.backgroundPosition="top";
		document.getElementById("fontsize_minus").style.backgroundPosition="top";
	}
}