/*
    Written by Jonathan Snook, http://www.snook.ca/jonathan
    Add-ons by Robert Nyman, http://www.robertnyman.com
*/

function getElementsByClassName(oElm, strTagName, strClassName){
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\-/g, "\\-");
    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
    var oElement;
    for(var i=0; i<arrElements.length; i++){
        oElement = arrElements[i];      
        if(oRegExp.test(oElement.className)){
            arrReturnElements.push(oElement);
        }   
    }
    return (arrReturnElements)
}

function toggle(obj) {
	var object = document.getElementById(obj);
	if (object) {
		var boxes=document.getElementsByClassName("box");
		var i;
		for (i=0;i<boxes.length;i++) {
			boxes[i].style.display="none";
		}
		object.style.display="block";
	}
}

function cls(obj) {
	var object=document.getElementById(obj);
	object.style.display="none";
}