document.getElementsByClassName = function(cl) {var retnode = [];var myclass = new RegExp('\\b'+cl+'\\b');var elem = this.getElementsByTagName('*');for (var i = 0; i < elem.length; i++) {var classes = elem[i].className;if (myclass.test(classes)) retnode.push(elem[i]);}return retnode;};

var contentDivs = document.getElementsByClassName("widecol");

var sizePlus = document.getElementById("zoomIn");
var sizeMinus = document.getElementById("zoomOut");

var posSizes = new Array("11px", "12px", "13px", "14px", "15px", "16px");
var nowSize = 1;

sizePlus.onclick = function(){
	if(nowSize < posSizes.length){
		nowSize ++;
		for(var i=0;i<contentDivs.length;i++){
			contentDivs[i].style.fontSize = posSizes[nowSize];
		}
	}
	return false;
}


sizeMinus.onclick = function(){
	if(nowSize > 0){
		nowSize --;
		for(var i=0;i<contentDivs.length;i++){
			contentDivs[i].style.fontSize = posSizes[nowSize];
			
		}
	}
	return false;
}