function getElementBy(id) { return document.getElementById(id); }

//	function addLoadEvent(func){
//		 alert("OKaddLoadEvent");
//		var oldonload = window.onload;
//		if (typeof window.onload != 'function') {
//			window.onload = func;
//		} else {
//			window.onload = function(){
//			oldonload();
//			func();
//			}
//		}
//	}
	function addBtn() {
		if(!getElementBy('ibanner')||!getElementBy('ibanner_pic')) return;
		var picList = getElementBy('ibanner_pic').getElementsByTagName('a');
		if(picList.length==0) return;
		var btnBox = document.createElement('div');
		btnBox.setAttribute('id','ibanner_btn');
		var SpanBox ='';
		for(var i=1; i<=picList.length; i++ ) {
			var spanList = '<span class="normal">'+i+'</span>';
			//var spanList = '<span class="normal"><img src="../images/banner/'+i+'">' '</></span>';
			SpanBox += spanList;
		}
		
		btnBox.innerHTML = SpanBox;
		getElementBy('ibanner').appendChild(btnBox);
		getElementBy('ibanner_btn').getElementsByTagName('span')[0].className = 'current';
		
		for (var m=0; m<picList.length; m++){
			var attributeValue = 'picLi_'+m
			picList[m].setAttribute('id',attributeValue);
		}
	}

	function moveElement(elementID,final_x,final_y,interval) {
		if (!document.getElementById) return false;
		if (!document.getElementById(elementID)) return false;
		var elem = document.getElementById(elementID);
		if (elem.movement) {
			clearTimeout(elem.movement);
		}
		if (!elem.style.left) {
			elem.style.left = "0px";
		}
		if (!elem.style.top) {
			elem.style.top = "0px";
		}
		var xpos = parseInt(elem.style.left);
		var ypos = parseInt(elem.style.top);
		if (xpos == final_x && ypos == final_y) {
			moveing = false;
			return true;
		}
		if (xpos < final_x) {
			var dist = Math.ceil((final_x - xpos)/10);
			xpos = xpos + dist;
		}
		if (xpos > final_x) {
			var dist = Math.ceil((xpos - final_x)/10);
			xpos = xpos - dist;
		}
		if (ypos < final_y) {
			var dist = Math.ceil((final_y - ypos)/10);
			ypos = ypos + dist;
		}
		if (ypos > final_y) {
			var dist = Math.ceil((ypos - final_y)/10);
			ypos = ypos - dist;
		}
		elem.style.left = xpos + "px";
		elem.style.top = ypos + "px";
		var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";
		elem.movement = setTimeout(repeat,interval);
	}

	function classNormal() {
		var btnList = getElementBy('ibanner_btn').getElementsByTagName('span');
		for (var i=0; i<btnList.length; i++){
			btnList[i].className='normal';
		}
	}
	
	function picZ() {
		var picList = getElementBy('ibanner_pic').getElementsByTagName('a');
		for (var i=0; i<picList.length; i++){
			picList[i].style.zIndex='1';
		}
	}
	
	var autoKey = false;

	function iBanner() {
		if(!getElementBy('ibanner')||!getElementBy('ibanner_pic')||!getElementBy('ibanner_btn')) return;
		getElementBy('ibanner').onmouseover = function(){autoKey = true};
		getElementBy('ibanner').onmouseout = function(){autoKey = false};
		
		var btnList = getElementBy('ibanner_btn').getElementsByTagName('span');
		var picList = getElementBy('ibanner_pic').getElementsByTagName('a');
		if (picList.length==1) return;
		picList[0].style.zIndex='2';
		for (var m=0; m<btnList.length; m++){
			btnList[m].onmouseover = function() {
				for(var n=0; n<btnList.length; n++) {
					if (btnList[n].className == 'current') {
						var currentNum = n;
					}
				}
				classNormal();
				picZ();
				this.className='current';
				picList[currentNum].style.zIndex='2';
				var z = this.childNodes[0].nodeValue-1;
				picList[z].style.zIndex='3';
				if (currentNum!=z){
					picList[z].style.left='1000px';
					moveElement('picLi_'+z,0,0,10);
				}
			}
		}
		
	}
   
	setInterval('autoBanner()', 6000);

	function autoBanner() {
		if(!getElementBy('ibanner')||!getElementBy('ibanner_pic')||!getElementBy('ibanner_btn')||autoKey) return;
		var btnList = getElementBy('ibanner_btn').getElementsByTagName('span');
		var picList = getElementBy('ibanner_pic').getElementsByTagName('a');
		if (picList.length==1) return;
		for(var i=0; i<btnList.length; i++) {
			if (btnList[i].className == 'current') {
				var currentNum = i;
			}
		}
		if (currentNum==(picList.length-1) ){
			classNormal();
			picZ();
			btnList[0].className='current';
			picList[currentNum].style.zIndex='2';
			picList[0].style.zIndex='3';
			picList[0].style.left='1000px';
			moveElement('picLi_0',0,0,10);
		} else {
			classNormal();
			picZ();
			var nextNum = currentNum+1;
			btnList[nextNum].className='current';
			picList[currentNum].style.zIndex='2';
			picList[nextNum].style.zIndex='3';
			picList[nextNum].style.left='1000px';
			moveElement('picLi_'+nextNum,0,0,10);
		}
	}
	
	//addLoadEvent(addBtn);
	//addLoadEvent(iBanner);