function changeFontSize(element,step)
{
    step = parseInt(step,10);
    var el = document.getElementById(element);
    var curentFount = el.style.fontSize;
	var curFont1=curentFount.replace("%","");
	
	
	if(curFont1=="" && step==15 ){
	var url=window.location.toString();
     if(url.indexOf("/ar/")!=-1){
	   el.style.fontSize = (100+15) + '%';
		el.style.lineHeight="24px";
	
    }
	else{
		el.style.fontSize = (100+15) + '%';
		el.style.lineHeight="18px";
	}
	}
	else{
	
	var curFont= parseInt(curFont1,10);
	if(step==-15){
	if(curFont1>100){
    el.style.fontSize = (curFont+step) + '%';
	var lineHeight=el.style.lineHeight;
	var lineHeight1=lineHeight.replace("px","");
	
	var lHeight1=parseInt(lineHeight1,10)-2;
   
	el.style.lineHeight=(lHeight1) + 'px';
	
	}
	}
	else{
		if(curFont1<145){
	el.style.fontSize = (curFont+step) + '%';
	var lineHeight=el.style.lineHeight;
	var lineHeight1=lineHeight.replace("px","");
	
		var lHeight1=parseInt(lineHeight1,10)+2;
		
	el.style.lineHeight=(lHeight1) + 'px';
		}
	
	}
	}
	
	
}

function changeFont(element,step)
{
	
    document.getElementById(element).style.fontSize =  (parseInt(document.getElementById(element).style.fontSize,10) + parseInt(step,10)) + '%';
}