JavaScript小事例 _JavaScript

JavaScript小例子
<html>
<head> 
    <style> 
	#vector {position:static;   border:1px solid red;   background-color:gray;}
	span    {display:block;     position:absolute;      font-size:20px;          
	         text-align:center; font-weight:bolder;
		     line-height:25px;  border:1px solid blue;  background-color:yellow; z-Index:10;}
	#input  {position:absolute; line-height:25px;       border:1px solid red;    
	         font-size:20px;    background-color:#DBDCDB;}
    </style>
</head>
<body onload="init()">
	<div id="vector" style="top:10px;left:10px;width:800px;height:300px;">
		<span>忠诚</span>   <span>博雅</span>   <span>朴实</span>   <span>刚毅</span>
		<span>求实</span>   <span>开拓</span>   <span>严谨</span>   <span>认真</span>
		<span>创新</span>   <span>高效</span>   <span>务实</span>   <span>进取</span>   
	</div>
	<p>
		<div id="input" style="top:350px;left:10px;height:25px;width:800px;">华师精神是:</div>
	</p>
</body>
<script>
var keywords  = ["忠诚","博雅","朴实","刚毅"]; //正确答案
var tryTimes  = keywords.length;
var isCorrect = 1;
var inputDom  = document.getElementById("input");
function init()
{
	var dom = document.getElementById("vector");
	var l = dom.children.length;
	for(var i=0;i<l;i++)
	{
		var node = dom.children[i];
		node.style.height = "25px";
		node.style.width  = "50px";
		node.style.top    = parseInt((Math.random()*(parseInt(dom.style.height)  -
										   parseInt(node.style.height)) + 
										   parseInt(dom.style.top))) + "px";
		node.style.left   = parseInt((Math.random()*(parseInt(dom.style.width)   -
										   parseInt(node.style.width)) + 
										   parseInt(dom.style.left))) + "px";
		node.isAnswer = 0;
		for(var j in keywords)
		{
			if(node.innerHTML == keywords[j])
			{
				node.isAnswer = 1;
				break;
			}
		}
		node.onmousedown = mouseDown;
	}
}

function mouseDown(e)
{
	e = e||event;
	document.movingDom = this;
	if(e.layerX) //IE下
	{
		this.offset = {coffsetX:e.layerX, coffsetY:e.layerY};
	}
	else  //ff下
	{
		this.offset = {coffsetX:e.offsetX, coffsetY:e.offsetY};
	}
	document.onmousemove = mouseMove;
	document.onmouseup   = mouseUp;
}

function mouseMove(e)
{
	e = e||event;
	var dom = this.movingDom;
	if(!(parseInt(dom.style.top)  == parseInt(inputDom.style.top)  && 
		 parseInt(dom.style.left) >= parseInt(inputDom.style.left) &&
		 parseInt(dom.style.left) <= (parseInt(inputDom.style.left) + 
		                              parseInt(inputDom.style.width) - 
									  parseInt(dom.style.width))))
	{
		dom.style.top  = e.clientY - dom.offset.coffsetY + "px";
		dom.style.left = e.clientX - dom.offset.coffsetX + "px";
	}
}

function mouseUp(e)
{
	var dom = this.movingDom;
	document.onmousemove = null;
	document.onmouseup   = null;
	if(  parseInt(dom.style.top ) == parseInt(inputDom.style.top)    && 
		 parseInt(dom.style.left) >= parseInt(inputDom.style.left)   &&
		 parseInt(dom.style.left) <= (parseInt(inputDom.style.left)  + 
		                              parseInt(inputDom.style.width) - 
									  parseInt(dom.style.width)))
	{
		dom.style.backgroundColor = "red";
		tryTimes--;
		isCorrect *= dom.isAnswer; 
		if(tryTimes==0)
		{
			isCorrect?alert("回答正确！"):alert("回答错误，回家去面壁");
			location.reload();
		}
	}
}






</script>

</html>