/*---------------------------------------------------------------*/
var global = new Object();
var navi=navigator.userAgent;
if(navi.indexOf("MSIE")!=-1 && navi.indexOf("Mac")!=-1) global.macIe = true;
/*---------------------------------------------------------------*/

document.getElementsByClassName = function(ClassName,tagName){
	if(!(this.all || this.getElementsByTagName)) return false;
	var elements=new Array();
	var allElements,i,len;

	if(tagName) allElements= this.getElementsByTagName(tagName) || this.all.tags(tagName);
	else allElements=this.all || this.getElementsByTagName("*");
	for(i=0,len=allElements.length; i<len; i++){
		if(allElements[i].className==ClassName) elements[elements.length]=allElements[i];
	}
	return elements;
}

/*---------------------------------------------------------------*/

function setMouseOver(){
	if(!document.getElementById) return false;
	var i;
	var imgElm = document.getElementsByClassName("navi","IMG");
	for(i=0;i<imgElm.length;i++){
		if(imgElm[i]==null || imgElm[i].src=="undefined" || !imgElm[i].parentNode.href){
		}else{
			imgElm[i].onmouseover = function(){
				if(!this.src) return false;
				this.imgOrg = this.src;
				var imgSrc;
				imgSrc = this.imgOrg.substr(0,this.imgOrg.lastIndexOf("."));
				imgExt = this.imgOrg.substr(this.imgOrg.lastIndexOf("."));
				this.src = imgSrc + "_o" + imgExt;
			}
			imgElm[i].onmouseout = function(){
				if(!this.imgOrg) return false;
				this.src = this.imgOrg;
			}
		}
	}
}

/*---------------------------------------------------------------*/

function setRandomLogo(){
	if(!document.getElementById) return false;
	var imgElm = document.getElementById("LOGO");
	if(imgElm==null || imgElm==undefined || imgElm.src==undefined){
	}else{
		var num = Math.ceil(5*Math.random());
		imgElm.src = '../Images/pi_0'+num+'.gif';
		return true;
	}
	return false;
}

/*---------------------------------------------------------------*/

function addEvent(obj,handle,lstnr) {
	if(obj.addEventListener){
		obj.addEventListener(handle,lstnr,false);
	}else if(obj.attachEvent){
		handle = "on" + handle;
		var oldfunc = obj[handle];
		if(typeof oldfunc != "function"){
			obj[handle] = lstnr;
		}else{
			obj.attachEvent(handle,lstnr);
		}
	}else{ // MacIE
		handle = "on"+handle;
		var oldfunc = obj[handle];
		if(typeof oldfunc != "function"){
			obj[handle] = lstnr;
		}else{
			obj[handle] = function(){oldfunc();lstnr();};
		}
	}
}
window.addOnload = function(lstnr){
	addEvent(window,'load',lstnr);
}
window.addOnload(setMouseOver);
window.addOnload(setRandomLogo);