八点改变div大小

其实还是比较简单的..............
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Resize</title> <style type="text/css"> #rRightDown,#rLeftDown,#rLeftUp,#rRightUp,#rRight,#rLeft,#rUp,#rDown{ position:absolute;background:#C00;6px;height:6px;z-index:5;font-size:0;} #rLeftDown,#rRightUp{cursor:ne-resize;} #rRightDown,#rLeftUp{cursor:nw-resize;} #rRight,#rLeft{cursor:e-resize;} #rUp,#rDown{cursor:n-resize;} #rRightDown{ bottom:-3px; right:-3px;} #rLeftDown{ bottom:-3px; left:-3px;} #rRightUp{ top:-3px; right:-3px;} #rLeftUp{ top:-3px; left:-3px;} #rRight{ right:-3px; top:50%} #rLeft{ left:-3px; top:50%} #rUp{ top:-3px; left:50%} #rDown{ bottom:-3px; left:50%} </style> </head> <body> <div id='ss' style="height:100px; 100px; border:1px solid #000000; position:absolute; left:200px; top:200px;" > <div id="rRightDown"> </div> <div id="rLeftDown"> </div> <div id="rRightUp"> </div> <div id="rLeftUp"> </div> <div id="rRight"> </div> <div id="rLeft"> </div> <div id="rUp"> </div> <div id="rDown"></div> </div> <script> var Sys = (function(ua){ var s = {}; s.IE = ua.match(/msie ([\d.]+)/)?true:false; s.Firefox = ua.match(/firefox\/([\d.]+)/)?true:false; s.Chrome = ua.match(/chrome\/([\d.]+)/)?true:false; s.IE6 = (s.IE&&([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 6))?true:false; s.IE7 = (s.IE&&([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 7))?true:false; s.IE8 = (s.IE&&([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 8))?true:false; return s; })(navigator.userAgent.toLowerCase()); var $ = function (id) { return document.getElementById(id); }; var Css = function(e,o){ for(var i in o) e.style[i] = o[i]; }; var Extend = function(destination, source) { for (var property in source) { destination[property] = source[property]; } }; var Bind = function(object, fun) { var args = Array.prototype.slice.call(arguments).slice(2); return function() { return fun.apply(object, args); } }; var BindAsEventListener = function(object, fun) { var args = Array.prototype.slice.call(arguments).slice(2); return function(event) { return fun.apply(object, [event || window.event].concat(args)); } }; var CurrentStyle = function(element){ return element.currentStyle || document.defaultView.getComputedStyle(element, null); }; function addListener(element,e,fn){ element.addEventListener?element.addEventListener(e,fn,false):element.attachEvent("on" + e,fn); }; function removeListener(element,e,fn){ element.removeEventListener?element.removeEventListener(e,fn,false):element.detachEvent("on" + e,fn) }; var Class = function(properties){ var _class = function(){return (arguments[0] !== null && this.initialize && typeof(this.initialize) == 'function') ? this.initialize.apply(this, arguments) : this;}; _class.prototype = properties; return _class; }; var Resize =new Class({ initialize : function(obj){ this.obj = obj; this.resizeelm = null; this.fun = null; //记录触发什么事件的索引 this.original = []; //记录开始状态的数组 this.width = null; this.height = null; this.fR = BindAsEventListener(this,this.resize); this.fS = Bind(this,this.stop); }, set : function(elm,direction){ if(!elm)return; this.resizeelm = elm; addListener(this.resizeelm,'mousedown',BindAsEventListener(this, this.start, this[direction])); return this; }, start : function(e,fun){ this.fun = fun; this.original = [parseInt(CurrentStyle(this.obj).width),parseInt(CurrentStyle(this.obj).height),parseInt(CurrentStyle(this.obj).left),parseInt(CurrentStyle(this.obj).top)]; this.width = (this.original[2]||0) + this.original[0]; this.height = (this.original[3]||0) + this.original[1]; addListener(document,"mousemove",this.fR); addListener(document,'mouseup',this.fS); }, resize : function(e){ this.fun(e); Sys.IE?(this.resizeelm.onlosecapture=function(){this.fS()}):(this.resizeelm.onblur=function(){this.fS()}) }, stop : function(){ removeListener(document, "mousemove", this.fR); removeListener(document, "mousemove", this.fS); window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty(); }, up : function(e){ this.height>e.clientY?Css(this.obj,{top:e.clientY + "px",height:this.height-e.clientY + "px"}):this.turnDown(e); }, down : function(e){ e.clientY>this.original[3]?Css(this.obj,{top:this.original[3]+'px',height:e.clientY-this.original[3]+'px'}):this.turnUp(e); }, left : function(e){ e.clientX<this.width?Css(this.obj,{left:e.clientX +'px',this.width-e.clientX + "px"}):this.turnRight(e); }, right : function(e){ e.clientX>this.original[2]?Css(this.obj,{left:this.original[2]+'px',e.clientX-this.original[2]+"px"}):this.turnLeft(e) ; }, leftUp:function(e){ this.up(e);this.left(e); }, leftDown:function(e){ this.left(e);this.down(e); }, rightUp:function(e){ this.up(e);this.right(e); }, rightDown:function(e){ this.right(e);this.down(e); }, turnDown : function(e){ Css(this.obj,{top:this.height+'px',height:e.clientY - this.height + 'px'}); }, turnUp : function(e){ Css(this.obj,{top : e.clientY +'px',height : this.original[3] - e.clientY +'px'}); }, turnRight : function(e){ Css(this.obj,{left:this.width+'px',e.clientX- this.width +'px'}); }, turnLeft : function(e){ Css(this.obj,{left:e.clientX +'px',this.original[2]-e.clientX+'px'}); } }); window.onload = function(){ new Resize($('ss')).set($('rUp'),'up').set($('rDown'),'down').set($('rLeft'),'left').set($('rRight'),'right').set($('rLeftUp'),'leftUp').set($('rLeftDown'),'leftDown').set($('rRightDown'),'rightDown').set($('rRightUp'),'rightUp'); } </script> </body> </html>

带范围控制的计算上比较烦琐不知道该如何优化写法..........

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Resize</title> <style type="text/css"> #rRightDown,#rLeftDown,#rLeftUp,#rRightUp,#rRight,#rLeft,#rUp,#rDown{ position:absolute;background:#C00;6px;height:6px;z-index:5;font-size:0;} #rLeftDown,#rRightUp{cursor:ne-resize;} #rRightDown,#rLeftUp{cursor:nw-resize;} #rRight,#rLeft{cursor:e-resize;} #rUp,#rDown{cursor:n-resize;} #rRightDown{ bottom:-3px; right:-3px;} #rLeftDown{ bottom:-3px; left:-3px;} #rRightUp{ top:-3px; right:-3px;} #rLeftUp{ top:-3px; left:-3px;} #rRight{ right:-3px; top:50%} #rLeft{ left:-3px; top:50%} #rUp{ top:-3px; left:50%} #rDown{ bottom:-3px; left:50%} #container{ height:400px; 400px; border:1px solid #0000FF; position:absolute; left:80px; top:80px; } </style> </head> <body> <div id="container"></div> <div id='ss' style="height:100px; 100px; border:1px solid #000000; position:absolute; left:200px; top:200px;" > <div id="rRightDown"> </div> <div id="rLeftDown"> </div> <div id="rRightUp"> </div> <div id="rLeftUp"> </div> <div id="rRight"> </div> <div id="rLeft"> </div> <div id="rUp"> </div> <div id="rDown"></div> </div> <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> <input value="设置外围容器范围" type="button" onclick="vvresize('a')" /> <input value="取消外围容器范围" type="button" onclick="vvresize('b')" /> <input value="设置最小范围" type="button" onclick="vvresize('c')" /> <input value="取消最小范围" type="button" onclick="vvresize('d')" /> <script> var Sys = (function(ua){ var s = {}; s.IE = ua.match(/msie ([\d.]+)/)?true:false; s.Firefox = ua.match(/firefox\/([\d.]+)/)?true:false; s.Chrome = ua.match(/chrome\/([\d.]+)/)?true:false; s.IE6 = (s.IE&&([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 6))?true:false; s.IE7 = (s.IE&&([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 7))?true:false; s.IE8 = (s.IE&&([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 8))?true:false; return s; })(navigator.userAgent.toLowerCase()); var $ = function (id) { return document.getElementById(id); }; var Css = function(e,o){ for(var i in o) e.style[i] = o[i]; }; var Extend = function(destination, source) { for (var property in source) { destination[property] = source[property]; } }; var Getpos = function(o){ var x = 0, y = 0; do{x += o.offsetLeft;y += o.offsetTop;}while((o=o.offsetParent)); return {'x':x,'y':y}; } var Bind = function(object, fun) { var args = Array.prototype.slice.call(arguments).slice(2); return function() { return fun.apply(object, args); } }; var BindAsEventListener = function(object, fun) { var args = Array.prototype.slice.call(arguments).slice(2); return function(event) { return fun.apply(object, [event || window.event].concat(args)); } }; var CurrentStyle = function(element){ return element.currentStyle || document.defaultView.getComputedStyle(element, null); }; function addListener(element,e,fn){ element.addEventListener?element.addEventListener(e,fn,false):element.attachEvent("on" + e,fn); }; function removeListener(element,e,fn){ element.removeEventListener?element.removeEventListener(e,fn,false):element.detachEvent("on" + e,fn) }; var Class = function(properties){ var _class = function(){return (arguments[0] !== null && this.initialize && typeof(this.initialize) == 'function') ? this.initialize.apply(this, arguments) : this;}; _class.prototype = properties; return _class; }; var Resize =new Class({ initialize : function(obj,container,max,min){ this.obj = obj; this.container = container; var config = Getpos(container); this.containerconfig ={l:config.x,t:config.y,w:container.offsetWidth,h:container.offsetHeight}; this.max = max==undefined?true:max; //是否限制最大化默认限制 this.min = min==undefined?false:min; //是否限制最小化默认不限制 this.resizeelm = null; this.fun = null; //记录触发什么事件的索引 this.original = []; //记录开始状态的数组 this.width = null; this.height = null; this.fR = BindAsEventListener(this,this.resize); this.fS = Bind(this,this.stop); }, set : function(elm,direction){ if(!elm)return; this.resizeelm = elm; addListener(this.resizeelm,'mousedown',BindAsEventListener(this, this.start, this[direction])); return this; }, start : function(e,fun){ this.fun = fun; this.original = [parseInt(CurrentStyle(this.obj).width),parseInt(CurrentStyle(this.obj).height),parseInt(CurrentStyle(this.obj).left),parseInt(CurrentStyle(this.obj).top)]; this.width = (this.original[2]||0) + this.original[0]; this.height = (this.original[3]||0) + this.original[1]; addListener(document,"mousemove",this.fR); addListener(document,'mouseup',this.fS); }, resize : function(e){ this.fun(e); Sys.IE?(this.resizeelm.onlosecapture=function(){this.fS()}):(this.resizeelm.onblur=function(){this.fS()}) }, stop : function(){ removeListener(document, "mousemove", this.fR); removeListener(document, "mousemove", this.fS); window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty(); }, up : function(e){ if(this.height>e.clientY) { var top = this.max?Math.max(this.containerconfig.t,e.clientY):e.clientY; var height = this.max?(this.height-top):this.height-e.clientY; Css(this.obj,{top:top + "px",height: Math.max(height,0) + "px"}); return; } !this.min&&this.turnDown(e); }, down : function(e){ if(e.clientY>this.original[3]) { var top = this.original[3]; var height = this.max?Math.min(e.clientY,this.containerconfig.t+this.containerconfig.h)-this.original[3]:e.clientY-this.original[3]; Css(this.obj,{top:this.original[3]+'px',height:Math.max(height-2,0)+'px'}); return; } !this.min&&this.turnUp(e); }, left : function(e){ if(e.clientX<this.width) { var left = this.max?Math.max(e.clientX,this.containerconfig.l):e.clientX; var width = this.max?this.width-left:this.width-e.clientX; Css(this.obj,{left:left +'px',Math.max(width,0)+ "px"}); return } !this.min&&this.turnRight(e); }, right : function(e){ if(e.clientX>this.original[2]) { var width = this.max?Math.min(e.clientX,this.containerconfig.l+this.containerconfig.w)-this.original[2]:e.clientX-this.original[2]; Css(this.obj,{left:this.original[2]+'px',Math.max(width-2,0)+"px"}); return; } !this.min&&this.turnLeft(e); }, leftUp:function(e){ this.up(e);this.left(e); }, leftDown:function(e){ this.left(e);this.down(e); }, rightUp:function(e){ this.up(e);this.right(e); }, rightDown:function(e){ this.right(e);this.down(e); }, turnDown : function(e){ var top = this.max?Math.min(this.height,this.containerconfig.t+this.containerconfig.h):this.height; var height = this.max?Math.min(e.clientY,this.containerconfig.t+this.containerconfig.h)-this.height:e.clientY - this.height; Css(this.obj,{top:top+'px',height:Math.max(height-2,0) + 'px'}); }, turnUp : function(e){ var top = this.max?Math.max(this.containerconfig.t,e.clientY):e.clientY; var height = this.max?this.original[3]-top:this.original[3] - e.clientY; Css(this.obj,{top : top +'px',height : Math.max(height,0) +'px'}); }, turnRight : function(e){ var width = this.max?Math.min(e.clientX,this.containerconfig.l+this.containerconfig.w)- this.e.clientX- this.width; Css(this.obj,{left:this.width+'px',Math.max(width-2,0) +'px'}); }, turnLeft : function(e){ var left = this.max?Math.max(e.clientX,this.containerconfig.l):e.clientX; var width = this.max?this.original[2]-left:this.original[2]-e.clientX; Css(this.obj,{left:left +'px',Math.max(width,0)+'px'}) } }); var resize; window.onload = function(){ resize = new Resize($('ss'),$('container')).set($('rUp'),'up').set($('rDown'),'down').set($('rLeft'),'left').set($('rRight'),'right').set($('rLeftUp'),'leftUp').set($('rLeftDown'),'leftDown').set($('rRightDown'),'rightDown').set($('rRightUp'),'rightUp'); } function vvresize(p){ var cc = { a:function(){resize.max=true}, b:function(){resize.max=false}, c:function(){resize.min=true}, d:function(){resize.min=false} } cc[p](); } </script> </body> </html>