/*--------------浮动广告-------------------*/
var stepx=2;
var stepy=1;
function move(){
	var annc=document.getElementById("ann");
	var posx=annc.offsetLeft;
	var posy=annc.offsetTop;
	if(posx<=0){
		stepx=2
	}
	if((document.documentElement.clientWidth-posx-annc.offsetWidth)<=0){
		stepx=-2;
	}
	posx=posx+stepx;
	annc.style.left=posx+"px";
	if(posy<=0){
		stepy=1;
	}
	if((document.documentElement.clientHeight-posy-annc.offsetHeight)<=0){
		stepy=-1;
	}
	posy=posy+stepy;
	annc.style.top=posy+"px";
	//ann.innerHTML="<a href=http://www.scledu.net/ >company</a>";
}
var intervalann;
function annv(){
	intervalann=setInterval('move()',10);
	
}
function stopann(){
	clearInterval(intervalann);
}
annv();

/*----------------弹出层效果-----------------------*/
var intervalmask;
function mask(){
	var mask=document.getElementById('mask');
	mask.style.display="block";
	mask.style.width=document.documentElement.clientWidth+"px";
	mask.style.height=document.documentElement.clientHeight+"px";	
	if(window.navigator.userAgent.indexOf("MSIE")>=1){
		mask.style.backgroundColor="black";
		mask.style.filter="alpha(opacity=80)";
		}else if (window.navigator.userAgent.indexOf("firefox")>=1) {
		mask.style.opacity="0.8";
		}else{
		mask.style.backgroundImage="url(images/bg.png)";
		}
}
function changecolor(){
	var clayer=document.getElementById("jump");
	clayer.style.display="block";
	layerwidth=clayer.offsetWidth;
	layerheight=clayer.offsetHeight;
	if (layerwidth<=400){			
		layerwidth+=4;
		clayer.style.width=layerwidth+"px";
	}
	if (layerwidth>=400 && layerheight<=400){
			
		layerheight+=4;
		clayer.style.height=layerheight+"px";
	}
}
function change(){
	intervalmask=setInterval('changecolor()',10);
}
function closemask(){
	clearInterval(intervalmask);
	document.getElementById("mask").style.display="none";
	document.getElementById("jump").style.display="none";
	document.getElementById("jump").style.width=0+"px";
	document.getElementById("jump").style.height=10+"px";
	
}