// JavaScript Document

//弹出登陆框
function sAlert(){
   var msgw,msgh,bordercolor;
   msgw=400;//提示窗口的宽度
   msgh=210;//提示窗口的高度
   titleheight=25 //提示窗口标题高度
   bordercolor="#81B6C6";//提示窗口的边框颜色
   titlecolor="#81B6C6";//提示窗口的标题颜色
   var sWidth,sHeight;
   sWidth=document.body.offsetWidth;//浏览器工作区域内页面宽度
   sHeight=screen.height;//屏幕高度（垂直分辨率）

   //背景层（大小与窗口有效区域相同，即当弹出对话框时，背景显示为放射状透明灰色）
   var bgObj=document.createElement("div");//创建一个div对象（背景层）
   //定义div属性，即相当于
   //<div id="bgDiv" style="position:absolute; top:0; background-color:#777; filter:progid:DXImagesTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75); opacity:0.6; left:0; width:918px; height:768px; z-index:10000;"></div>
   bgObj.setAttribute('id','bgDiv');
   bgObj.style.position="absolute";
   bgObj.style.top="0";
   bgObj.style.background="#777";
   bgObj.style.filter="progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75";
   bgObj.style.opacity="0.6";
   bgObj.style.left="0";
   bgObj.style.width=sWidth + "px";
   bgObj.style.height=sHeight + "px";
   bgObj.style.zIndex = "10000";
   document.body.appendChild(bgObj);//在body内添加该div对象

   var msgObj=document.createElement("div")//创建一个div对象（提示框层）
   //定义div属性，即相当于
   //<div id="msgDiv" align="center" style="background-color:white; border:1px solid #336699; position:absolute; left:50%; top:50%; font:12px/1.6em Verdana,Geneva,Arial,Helvetica,sans-serif; margin-left:-225px; margin-top:npx; width:400px; height:100px; text-align:center; line-height:25px; z-index:100001;"></div>
   msgObj.setAttribute("id","msgDiv");
   msgObj.setAttribute("align","center");
   msgObj.style.background="white";
   msgObj.style.border="1px solid " + bordercolor;
   msgObj.style.position = "absolute";
   msgObj.style.left = "50%";
   msgObj.style.top = "50%";
   msgObj.style.font="12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";
   msgObj.style.marginLeft = "-225px" ;
   msgObj.style.marginTop = -75+document.documentElement.scrollTop+"px";
   msgObj.style.width = msgw + "px";
   msgObj.style.height =msgh + "px";
   msgObj.style.textAlign = "center";
   msgObj.style.lineHeight ="25px";
   msgObj.style.zIndex = "10001";
  
   var title=document.createElement("h4");//创建一个h4对象（提示框标题栏）
   //定义h4的属性，即相当于
   //<h4 id="msgTitle" align="right" style="margin:0; padding:3px; background-color:#336699; filter:progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100); opacity:0.75; border:1px solid #336699; height:18px; font:12px Verdana,Geneva,Arial,Helvetica,sans-serif; color:white; cursor:pointer;" onclick="">关闭</h4>
   title.setAttribute("id","msgTitle");
   title.setAttribute("align","right");
   title.style.margin="0";
   title.style.padding="3px";
   title.style.background=bordercolor;
   title.style.filter="progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);";
   title.style.opacity="0.75";
   title.style.border="1px solid " + bordercolor;
   title.style.height="18px";
   title.style.font="12px Verdana, Geneva, Arial, Helvetica, sans-serif";
   title.style.color="white";
   title.style.cursor="pointer";
   title.innerHTML="Close";
   title.onclick=removeObj;
   var button=document.createElement("input");//创建一个input对象（提示框按钮）
   //定义input的属性，即相当于
   //<input type="button" align="center" style="width:100px; align:center; margin-left:250px; margin-bottom:10px;" value="关闭">
   button.setAttribute("type","button");
   button.setAttribute("value","Close");
   button.style.width="60px";

   button.style.align="center";
   button.style.marginLeft="250px";
   button.style.marginBottom="10px";
   button.style.background=bordercolor;
   button.style.border="1px solid "+ bordercolor;
   button.style.color="white";
   button.onclick=removeObj;
  
   function removeObj(){//点击标题栏触发的事件
     document.body.removeChild(bgObj);//删除背景层Div
     document.getElementById("msgDiv").removeChild(title);//删除提示框的标题栏
     document.body.removeChild(msgObj);//删除提示框层
   }
   
   document.body.appendChild(msgObj);//在body内添加提示框div对象msgObj
   document.getElementById("msgDiv").appendChild(title);//在提示框div中添加标题栏对象title
   var txt=document.createElement("p");//创建一个p对象（提示框提示信息）
   //定义p的属性，即相当于
   //<p style="margin:1em 0;" id="msgTxt">测试效果</p>
   txt.style.margin="1em 0"
   txt.setAttribute("id","msgTxt");
   //
   txt.innerHTML="<div style='padding:20px 0 20px 0;text-align:center'>"+"<div align='center'><form name='f1' method='post' action='CheckLoginServlet'><table><tr><td align='right'><p>username</p></td><td align='left'><input type='text' name='username'> </td></tr><tr><td align='right'>password<td align='left'><input type='password' name='password'></td></tr><tr> <td align='right'><input type='submit' value='submit' onclick='isValid()' /></td><td align='left'><input type='reset' value='reset'> </td></tr></table></form></div>"+"</div>";
   document.getElementById("msgDiv").appendChild(txt);//在提示框div中添加提示信息对象txt
   document.getElementById("msgDiv").appendChild(button);//在提示框div中添加按钮对象button
   }
   
   
 //3D轮播图
 $(document).ready(function(){

	var deg=0;

	/* Storing all the images into a variable */

	var images	= $('#stage img').removeClass('default').addClass('animationReady');
	var dim		= { width:images.width(),height:images.height()};
	
	var cnt = images.length;
	
	/* Finding the centers of the animation container: */
	var centerX = $('#stage').width()/2;
	var centerY = $('#stage').height()/2 - dim.height/2;

	function rotate(step,total){
		// This function loops through all the phone images, and rotates them
		// with "step" degrees (10 in this implementation) until total has reached 0
	
		/* Increment the degrees: */
		deg+=step;
		
		var eSin,eCos,newWidth,newHeight,q;
		
		/* Loop through all the images: */
		for(var i=0;i<cnt;i++){
			
			/* Calculate the sine and cosine for the i-th image */
			
			q = ((360/cnt)*i+deg)*Math.PI/180;
			eSin		= Math.sin(q);
			eCos		= Math.cos(q);
			
			/*
			/	With the sine value, we can calculate the vertical movement, and the cosine 
			/	will give us the horizontal movement.
			*/
			
			q = (0.6+eSin*0.4);
			newWidth	= q*dim.width;
			newHeight	= q*dim.height;
			
			/*
			/	We are using the calculated sine value (which is in the range of -1 to 1)
			/	to calculate the opacity and z-index. The front image has a sine value
			/	of 1, while the backmost one has a sine value of -1.
			*/
			
			images.eq(i).css({
				top			: centerY+15*eSin,
				left		: centerX+200*eCos,
				opacity		: 0.8+eSin*0.2,
				marginLeft	: -newWidth/2,
				zIndex		: Math.round(80+eSin*20)
			}).width(newWidth).height(newHeight);
		}

		total-=Math.abs(step);
		if(total<=0) return false;
		
		// Setting the function to be run again in 40 seconds (equals to 25 frames per second):
		setTimeout(function(){rotate(step,total)},40);
	
	}
	
	// Running the animation once at load time (and moving the iPhone into view):
	rotate(10,360/cnt);
	
	$('#phoneCarousel .previous').click(function(){
		// 360/cnt lets us distribute the phones evenly in a circle
		rotate(-10,360/cnt);
	});
	
	$('#phoneCarousel .next').click(function(){
		rotate(10,360/cnt);
	});
});  
   
   
