拖动鼠标画出方框JS鼠标选区代码

时间：2013-08-09 08:34 来源：互联网作者：源码搜藏浏览：次收藏挑错推荐打印

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh" lang="zh">
<head>
<title>鼠标拖动画矩形-作者:hsb008-源码搜藏</title>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<style type="text/css">
body,h1,h2,h3,h4,h5,h6,hr,p,blockquote,dl,dt,dd,ul,ol,li,pre,form,fieldset,legend,button,input,textarea,th,td{margin:0;padding:0}
html{color:#000;overflow-y:scoll;overflow:-moz-scrollbars-vertical}
.div{position:absolute; border:1px dashed blue; width:0px; height:0px;left:0px; top:0px; overflow:hidden;}
.retc{position:absolute; border:1px solid #CCCCCC; overflow:hidden; background:#EFEFEF}
</style>
</head>
<body>	
</body>
<script language = "javascript">
	var wId = "w";
	var index = 0;
	var startX = 0, startY = 0;
	var flag = false;
	var retcLeft = "0px", retcTop = "0px", retcHeight = "0px", retcWidth = "0px";
	document.onmousedown = function(e){
		flag = true;
		try{
			var evt = window.event || e;
			var scrollTop = document.body.scrollTop || document.documentElement.scrollTop;
			var scrollLeft = document.body.scrollLeft || document.documentElement.scrollLeft;
			startX = evt.clientX + scrollLeft;
			startY = evt.clientY + scrollTop;
			index++;
			var div = document.createElement("div");
			div.id = wId + index;
			div.className = "div";
			div.style.marginLeft = startX + "px";
			div.style.marginTop = startY + "px";
			document.body.appendChild(div);
		}catch(e){
		//alert(e);
		}
	}
	document.onmouseup = function(){
		try{
			document.body.removeChild($(wId + index));
			var div = document.createElement("div");
			div.className = "retc";
			div.style.marginLeft = retcLeft;
			div.style.marginTop = retcTop;
			div.style.width = retcWidth;
			div.style.height = retcHeight;
			document.body.appendChild(div);
		}catch(e){
			//alert(e);
		}
		flag = false;
	}
	document.onmousemove = function(e){
		if(flag){
			try{
			var evt = window.event || e;
			var scrollTop = document.body.scrollTop || document.documentElement.scrollTop;
			var scrollLeft = document.body.scrollLeft || document.documentElement.scrollLeft;
			retcLeft = (startX - evt.clientX - scrollLeft > 0 ? evt.clientX + scrollLeft : startX) + "px";
			retcTop = (startY - evt.clientY - scrollTop > 0 ? evt.clientY + scrollTop : startY) + "px";
			retcHeight = Math.abs(startY - evt.clientY - scrollTop) + "px";
			retcWidth = Math.abs(startX - evt.clientX - scrollLeft) + "px";
			$(wId + index).style.marginLeft = retcLeft;
			$(wId + index).style.marginTop = retcTop;
			$(wId + index).style.width = retcWidth;
			$(wId + index).style.height = retcHeight;
			}catch(e){
				//alert(e);
			}	
		}
	}
	var $ = function(id){
		return document.getElementById(id);
	}
</script>
</html>

拖动鼠标画出方框JS鼠标选区代码

网页特效