发布于 2017-01-01 00:38:04 | 74 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Javascript教程,程序狗速度看过来!

JavaScript客户端脚本语言

Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言,主要目的是为了解决服务器端语言,比如Perl,遗留的速度问题,为客户提供更流畅的浏览效果。


这篇文章介绍了JS自动适应的图片弹窗实例代码,有需要的朋友可以参考一下

/************************************自动适应的图片弹窗*********************************/ 
var autoImg=function(argcs){/*调整图片大小,等比例缩放argcs['maxHeight']=>最大高度,argcs['maxWidth']=>最大宽度,argcs['height']=>图片高度,argcs['width']=>图片宽度*/ 
                var _maxHeight=''; 
                var _maxWidth=''; 
                var _newSize=[]; 

                if(argcs['maxHeight']){ 
                    _maxHeight=argcs['maxHeight']; 
                    } 
                if(argcs['maxWidth']){ 
                    _maxWidth=argcs['maxWidth']; 
                    } 
                if(!argcs['height']){ 
                    throw new Error('height未指定'); 
                    } 
                if(!argcs['width']){ 
                    throw new Error('width未指定'); 
                    } 
                if(argcs['height']>argcs['width']||argcs['height']==argcs['width']){//高度不小于宽度的情况 
                        if(argcs['height']>=_maxHeight){ 
                                _newSize['height']=_maxHeight; 
                                _newSize['width']=(_maxHeight/argcs['height'])*argcs['width']; 
                            }else{ 
                                _newSize['width']=argcs['width']; 
                                _newSize['height']=argcs['height']; 
                                } 
                        return _newSize; 
                    } 
                if(argcs['width']>argcs['height']){//宽度大于高度的情况 
                        if(argcs['width']>=_maxWidth){ 
                                _newSize['width']=_maxWidth; 
                                _newSize['height']=(_maxWidth/argcs['width'])*argcs['height']; 
                            }else{ 
                                _newSize['width']=argcs['width']; 
                                _newSize['height']=argcs['height']; 
                                } 
                        return _newSize; 
                    }                
                } 

    var imgBox=function(imgSrc){             
            var winImg=new popBox({//图片弹窗 
                ID:'imgBox', 
                bgColor:'#a3c90e', 
                width:906, 
                moveHandle:false, 
                closeButton:false, 
                height:'auto', 
                times:250, 
                lock:true, 
                content:'', 
                shadow:true, 
                position:'center', 
                displayCallBack:function(){ 
                                       $('body').append('<img id="loading" src="/template/27/img/loading.gif"/>'); 
                    $('img[id=loading]').css('z-index',110000).css({position:'absolute',left:$(window).scrollLeft()+($(window).width())/2-($('img[id=loading]').width())/2-22,top:$(window).scrollTop()+($(window).height()/2-($('img[id=loading]').width())/2)}); 
                    /************图片预加载,重新调整窗口大小及位置**************/ 
                    var img=new Image(); 
                    var _imgWidth=0; 
                    var _imgHeight=0; 
                    img.src=imgSrc;//为img对象添加地址 
                                       // console.log(imgSrc); 
                                        /*************************图片加载完成之后***************************/ 
                    img.onload=function(){ 
                                               $('img[id=loading]').remove(); 
                        _imgWidth=img.width; 
                        _imgHeight=img.height; 
                        var argcs=[]; 
                        var winWidth=$(window).width(); 
                        argcs['maxHeight']=750;//最大高度 
                        argcs['maxWidth']=900;//最大宽度 
                        argcs['height']=_imgHeight; 
                        argcs['width']=_imgWidth; 
                        var newWH=autoImg(argcs);//获得缩略后的图片宽和高 
                        /************图片预加载,重新调整窗口大小及位置************/ 
                        $('#'+winImg.ID).css({width:newWH['width'],height:newWH['height'],top:parseInt($(document).scrollTop())+parseInt(($(window).height()-newWH['height'])/2),left:$(document).scrollLeft()+parseInt(winWidth/2)-parseInt(newWH['width']/2)}); 
                        $('#'+winImg.ID).html('<img src="'+img.src+'" width="'+newWH['width']+'" height="'+newWH['height']+'"/>'); 
                        /************图片预加载,重新调整窗口大小及位置**************/ 

                        $('#'+winImg.ID+'_bg').css('cursor','pointer').click(function(){ 
                            winImg.kill(); 
                            }); 
                        }; 
                                        /*************************图片加载完成之后***************************/  
                    }, 
                unDisplayCallBack:function(){ 

                    }, 
                killCallBack:function(){ 
                    } 
                }); 
                winImg.dispaly(); 
    } 

popBox代码

//若使用移动功能,请先导入jQuery移动UI组件 
var popBox=function(settings){//弹窗函数settings=[] 
        //alert(typeof settings['width']); 
        //alert(settings['displayCallBack']); 
        /************************本类私有变量*****************************/ 
        /*******************默认值*****************/ 
        var _shadow=true;//是否有遮罩true/false 
        var _closeButton=false;//关闭按钮false/dom元素 
        var _killButton=false;//kill按钮false/dom元素 
        var _moveHandle=false;//拖动手柄false/dom元素 
        var _width=650;//宽, 
        var _bgColor='#FFF';//背景样式 
        var _height='auto';//高 
        var _content='没有内容';//内容 
        var _position='center';/*位置topLeft,topCenter,topRight,center,bottomLeft,bottomRight,bottomCenter*/ 
        var _lock=true;//是否锁定 
        var _times=500;//显示,隐藏的时间 
        var _displayCallBack=function(){//dispaly回调函数 
                alert('display'); 
            } 
        var _unDisplayCallBack=function(){//unDispaly回调函数 
                alert('unDisplay'); 
            } 
        var _beforeKillCallBack=function(){ 
                alert('beforeKill'); 
            }//kill之前的回调函数 
        var _killCallBack=function(){//kill回调函数 
                alert('kill'); 
            } 
        /*******************默认值*****************/ 
        if(settings['closeButton']!==undefined){ 
            //alert('shadow'); 
            _closeButton=settings['closeButton']; 
            }    
        if(settings['killButton']!==undefined){ 
            //alert('shadow'); 
            _killButton=settings['killButton']; 
            } 
        if(settings['moveHandle']!==undefined){ 
            //alert('shadow'); 
            _moveHandle=settings['moveHandle']; 
            }                
        /******************获得设置值********************/ 
        /**settings['shadow']!=' ' && settings['shadow']!=undefined*/ 
        if(settings['shadow']!==undefined){ 
            //alert('shadow'); 
            _shadow=settings['shadow']; 
            } 
        if(settings['bgColor']!==undefined){ 
            //alert('shadow'); 
            _bgColor=settings['bgColor']; 
            } 
        if( settings['width']!==undefined){ 
            _width=settings['width']; 
            } 
        if( settings['height']!==undefined){ 
            _height=settings['height']; 
            } 
        if(settings['content']!==undefined){ 
            _content=settings['content']; 
            } 
        if(settings['position']!==undefined){ 
            _position=settings['position']; 
            } 
        if( settings['times']!==undefined){ 
            _times=settings['times']; 
            } 
        if(settings['lock']!==undefined){ 
            _lock=settings['lock']; 
            } 
        if(settings['displayCallBack']!=undefined){ 
            //alert('here'); 
            _displayCallBack=settings['displayCallBack']; 
            }        
        if( settings['unDisplayCallBack']!==undefined){ 
            _unDisplayCallBack=settings['unDisplayCallBack']; 
            }    
        if( settings['beforeKillCallBack']!==undefined){ 
            _beforeKillCallBack=settings['beforeKillCallBack']; 
            } 
        if( settings['killCallBack']!==undefined){ 
            _killCallBack=settings['killCallBack']; 
            } 

        //alert(settings['shadow']); 
        //alert(_shadow); 
        /************************本类私有变量******************************/ 

         

        /*********************本类内部变量********************/    
        var _this=this;              
        var _baseZindex=10000; 
        var _domWidth=$(document).width(); 
        var _domHeight=$(document).height(); 
        /********************本类内部变量*******************/ 

         
        /********************本类私有函数**********************/ 
        var _getZindex=function(){/*获得z-index->首先遍历网页div元素ID中含有popBox的DOM,获得数量,然后本弹窗背景z-index=基数+当前数量+1,弹框z-index=基数+当前数量+2*/ 
                var _len=$('body').children('div').length; 
                var _countDiv=0; 
                var _divObj=$('body').children('div'); 
                var _reg=/^popBox_/;//正则表达式 
                for(var i=0;i<_len;i++){ 
                    if(_reg.test(_divObj.eq(i).attr('ID'))){ 
                            _countDiv+=1; 
                        } 
                    } 
                return _countDiv;//返回已有弹框的数量 
            } 
        var _getWinZindex=function(){//获得弹窗的z-index 
                var _winZindex=_baseZindex+_getZindex()+2; 
                return _winZindex; 
            } 
        var _geWinBgZindex=function(){//获得弹窗背景的z-index 
                var _winBgZindex=_baseZindex+_getZindex()+1; 
                return _winBgZindex;                 
            } 
        var _renderBg=function(){//渲染背景  www.phperz.com
                var _winBgZindex=_geWinBgZindex(); 
                //alert($(document).height()); 
                $('body').append('<div id="'+_this.ID+'_bg"></div>');//在body中插入一个半透明的背景 
                $('#'+_this.ID+'_bg').addClass('popBox_bg').css({height:_domHeight,width:_domWidth,opcity:0}).css('z-index',_winBgZindex).fadeTo(_times,0.7); 
            } 
        var _creatWin=function(){//创建窗体 
                $('body').append('<div id="'+_this.ID+'"></div>'); 
                _renderContent(_content);//渲染弹窗主体 
                _initWin();//初始化窗体 
            } 
        var _initWin=function(){//初始化窗体 
                var _winZindex=_getWinZindex(); 
                var _transHeight=0; 
                if(_height=='auto'){ 
                    _transHeight='auto'; 
                    }else{ 
                        _transHeight=parseInt(_height)+'px'; 
                        } 
                $('#'+_this.ID).css({width:parseInt(_width)+'px',height:_transHeight,position:'absolute',opticity:1.0,background:_bgColor}).css('z-index',_winZindex); 
                if(_lock==false){ 
                    if(_moveHandle!==undefined&&_moveHandle!==false&&_moveHandle!==' '){ 
                        $('#'+_this.ID).children(_moveHandle).css('cursor','move'); 
                        //alert(_moveHandle); 
                        //alert($('#'+_this.ID).children(_moveHandle).html()); 
                        } 
                    } 
                _locationWin();//为窗体定位 
            } 
        var _locationWin=function(){/*为窗体定位topLeft,topCenter,topRight,centerLeft,center,centerRight,bottomLeft,bottomCenter,bottomRight*/ 
            var _windowHeight=parseInt($(window).height()); 
            var _windowWidth=parseInt($(window).width()); 
            //alert(_windowWidth+_height);   
            var _left=(_windowWidth-parseInt(_width))/2; 
            var _top=parseInt($(document).scrollTop())+parseInt(($(window).height()-$('#'+_this.ID).height())/2); 
            $('#'+_this.ID).css({top:_top+'px',left:_left+'px'}); 
            } 
        var _renderContent=function(content){//渲染弹窗主体 
                $('#'+_this.ID).append(content); 
            } 
        var bindEvent=function(){//绑定事件 
            if(_this.status!=='kill'&&_this.status!=='init'){ 
                        if(_closeButton!==undefined&&_closeButton!==' '&&_closeButton!==false){ 
                            $('#'+_this.ID+' '+_closeButton).css('cursor','pointer').live('click',function(e){ 
                            _this.unDisplay(); 
                            });                          
                        }//若设置了关闭(close)按钮 
                        if(_killButton!==undefined&&_killButton!==' '&&_killButton!==false){ 
                            $('#'+_this.ID+' '+_killButton).css('cursor','pointer').live('click',function(e){ 
                            _this.kill(); 
                            });                          
                        }//若设置了杀死(kill)按钮 
                    } 
                if(_lock==false){ 
                    $('#'+_this.ID).draggable({cancel:''}); 
                    } 
            }        
        /*********************本类私有函数*****************/ 

         
        /**********************本类公有函数******************/ 
        this.status='init';//当前状态init->初始化状态,display->display状态,undisplay->undisplay状态,kill->kill状态 
        this.ID=''; 
        var _ID=settings['ID']; 
        if(_ID==' '||(typeof _ID)==undefined){ 
            throw new Error('ID不能为空'); 
            }else{ 
                this.ID='popBox_'+_ID; 
                } 
        this.display=function(){//显示函数,如果状态是init或者kill重新渲染页面 
            //alert(_this.status); 
            if(_this.status=='init'||_this.status=='kill'){ 
                    _creatWin();//创建窗体 
                    //$('#'+_this.ID).css('height',_domHeight); 
                    if(_shadow==true){//渲染遮罩 
                        /*alert(_shadow);*/ 
                        _renderBg(); 
                        } 
                    _this.status='display'; 
                    _displayCallBack(); 
                }else{ 
                    $('#'+_this.ID).fadeIn(_times); 
                    if(_shadow==true){ 
                        $('#'+_this.ID+'_bg').fadeIn(_times); 
                        } 
                    _this.status='display'; 
                    } 
            //alert(typeof _displayCallBack); 
            //alert(_this.status); 
            bindEvent(); 
            } 
        this.kill=function(){//彻底移除 
            //alert(_this.status); 
            //alert(_this.status); 
            if(_this.status=='kill'||_this.status=='init'){ 
                //alert(_this.status); 
                throw new Error('非法操作,当前状态不允许kill'); 
            } 
            if(_beforeKillCallBack!=undefined){ 
                    _beforeKillCallBack(); 
                    } 
            $('#'+_this.ID).remove(); 
            if(_shadow==true){ 
                $('#'+_this.ID+'_bg').remove(); 
                } 
            _this.status='kill'; 
            if(_killCallBack!=undefined){ 
                    _killCallBack(); 
                    } 
            } 
        this.unDisplay=function(){//隐藏函数 
            if(_this.status=='init'||_this.status=='kill'){ 
                throw new Error('非法操作,当前状态不允许undisplay'); 
                } 
            if(_unDisplayCallBack!=undefined){ 
                _unDisplayCallBack(); 
                } 
            $('#'+_this.ID).fadeOut(_times); 
            $('#'+_this.ID+'_bg').fadeOut(_times); 
            _this.status='undisplay';        
            } 
        /**********************本类公有函数******************/ 

         
    }//popBox网页弹窗 

var errorBox=function(errorMsg){ 
        //alert(typeof errorBox); 
            //alert(errorBox.length); 
            var errorObj=new popBox({ 
            ID:'errorObj', 
            bgColor:'#FFF', 
            width:300, 
            moveHandle:false, 
            closeButton:false, 
            height:'auto', 
            times:200, 
            lock:true, 
            content:$('#errorBoxContent').html(), 
            shadow:true, 
            position:'center', 
            displayCallBack:function(){  
                    $('#'+errorObj.ID).find('.errorMessage').html(); 
                    $('#'+errorObj.ID).find('.errorMessage').html(errorMsg); 
                    $('#'+errorObj.ID).find('.errorConfirm input').click(function(){ 
                        //alert('here'); 
                        errorObj.kill(); 
                        }); 
                }, 
            unDisplayCallBack:function(){ 
                throw new Error('错误不可以关闭,只可以Kill');//错误方法只能Kill,不能关闭 
                }, 
            killCallBack:function(){ 
                //errorBox=null; 
                } 
            }); 
        errorObj.dispaly();  
    }//错误弹窗 


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