📄 index.jsp

📁 JSP程序开发范例宝典范例编号311-316

💻 JSP

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<%@ page contentType="text/html; charset=gb2312" language="java"%>
<html>
<title>浮动广告</title>
<body topmargin="0" leftmargin="0" >
<script language="JavaScript">
var delta=0.15
var layers;
function floaters() {
	this.items= [];
	this.addItem= function(id,x,y,content){
		document.write('<div id='+id+' style="z-index: 10; position: absolute;  width:80px; height:60px;left:'+(typeof(x)=='string'?eval(x):x)+';top:'+(typeof(y)=='string'?eval(y):y)+'">'+content+'</div>');
		var newItem= {};
		newItem.object= document.getElementById(id);
		if(y>10) {y=0}
		newItem.x= x;
		newItem.y= y; 
		this.items[this.items.length]= newItem;
	}
	this.play= function(){
		layers= this.items
		setInterval('play()',10);
	}
}
function play(){
	for(var i=0;i<layers.length;i++){
		var obj= layers[i].object;
		var obj_x= (typeof(layers[i].x)=='string'?eval(layers[i].x):layers[i].x);
		var obj_y= (typeof(layers[i].y)=='string'?eval(layers[i].y):layers[i].y); 
		if(obj.offsetLeft!=(document.body.scrollLeft+obj_x)) {
			var dx=(document.body.scrollLeft+obj_x-obj.offsetLeft)*delta;
			dx=(dx>0?1:-1)*Math.ceil(Math.abs(dx));
			obj.style.left=obj.offsetLeft+dx;
		} 
		if(obj.offsetTop!=(document.body.scrollTop+obj_y)) {
			var dy=(document.body.scrollTop+obj_y-obj.offsetTop)*delta;
			dy=(dy>0?1:-1)*Math.ceil(Math.abs(dy));
			obj.style.top=obj.offsetTop+dy;
		}
		obj.style.display= '';
	}
}    
        
var strfloat = new floaters();
strfloat.addItem("followDiv",6,80,"<img src='ad.jpg'  border='0'>"); 
strfloat.play();    
</script>
<table width="670" border="0" cellspacing="0" cellpadding="0" align="right">
  <tr>
    <td align="right"><%@ include file="source.jsp" %></td>
  </tr>
</table>

</body>
</html>

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