https://www.excelsecu.com/PC/js/jqzoom.js

1(function($){
2
3		$.fn.jqueryzoom = function(options){
4		var settings = {
5				xzoom: 316,//zoomed width default width
6				yzoom: 282,//zoomed div default width
7				offset:20,	//zoomed div default offset
8				position: "right",//zoomed div default position,offset position is to the right of the image
9				lens:1, //zooming lens over the image,by default is 1;
10				preload: 1
11			};
12
13			if(options) {
14				$.extend(settings, options);
15			}
16
17		    var noalt='';
18		    $(this).hover(function(){
19
20		    var imageLeft = this.offsetLeft;
21		    var imageRight = this.offsetRight;
22		    var imageTop =  $(this).get(0).offsetTop;
23		    var imageWidth = $(this).children('img').get(0).offsetWidth;
24		    var imageHeight = $(this).children('img').get(0).offsetHeight;
25
26
27            noalt= $(this).children("img").attr("alt");
28
29		    var bigimage = $(this).children("img").attr("jqimg");
30
31            $(this).children("img").attr("alt",'');
32
33		    if($("div.zoomdiv").get().length == 0){
34
35		    $(this).after("<div class='zoomdiv'><img class='bigimg' src='"+bigimage+"'/></div>");
36
37
38		    $(this).append("<div class='jqZoomPup'>&nbsp;</div>");
39
40		    }
41
42
43		    if(settings.position == "right"){
44
45            //if(imageLeft + imageWidth + settings.offset + settings.xzoom > screen.width){
46
47            //leftpos = imageLeft  - settings.offset - settings.xzoom;
48            //ipad
49
50            //}else{
51
52		    leftpos = imageLeft + imageWidth + settings.offset;
53
54            //}
55		    }else{
56		    leftpos = imageLeft - settings.xzoom - settings.offset;
57		    if(leftpos < 0){
58
59            leftpos = imageLeft + imageWidth  + settings.offset;
60
61		    }
62
63		    }
64
65		    $("div.zoomdiv").css({ top: imageTop,left: leftpos });
66
67		    $("div.zoomdiv").width(settings.xzoom);
68
69		    $("div.zoomdiv").height(settings.yzoom);
70
71            $("div.zoomdiv").show();
72
73            if(!settings.lens){
74              $(this).css('cursor','crosshair');
75			}
76
77
78
79
80				   $(document.body).mousemove(function(e){
81
82
83
84                   mouse = new MouseEvent(e);
85
86                   /*$("div.jqZoomPup").hide();*/
87
88
89				    var bigwidth = $(".bigimg").get(0).offsetWidth;
90
91				    var bigheight = $(".bigimg").get(0).offsetHeight;
92
93				    var scaley ='x';
94
95				    var scalex= 'y';
96
97
98				    if(isNaN(scalex)|isNaN(scaley)){
99
100				    var scalex = (bigwidth/imageWidth);
101
102				    var scaley = (bigheight/imageHeight);
103
104
105
106
107				    $("div.jqZoomPup").width((settings.xzoom)/scalex );
108
109		    		$("div.jqZoomPup").height((settings.yzoom)/scaley);
110
111                    if(settings.lens){
112                    $("div.jqZoomPup").css('visibility','visible');
113					}
114
115				   }
116
117
118
119                    xpos = mouse.x - $("div.jqZoomPup").width()/2 - imageLeft;
120
121                    ypos = mouse.y - $("div.jqZoomPup").height()/2 - imageTop ;
122
123                    if(settings.lens){
124
125                    xpos = (mouse.x - $("div.jqZoomPup").width()/2 < imageLeft ) ? 0 : (mouse.x + $("div.jqZoomPup").width()/2 > imageWidth + imageLeft ) ?  (imageWidth -$("div.jqZoomPup").width() -2)  : xpos;
126
127					ypos = (mouse.y - $("div.jqZoomPup").height()/2 < imageTop ) ? 0 : (mouse.y + $("div.jqZoomPup").height()/2  > imageHeight + imageTop ) ?  (imageHeight - $("div.jqZoomPup").height() -2 ) : ypos;
128
129                    }
130
131
132                    if(settings.lens){
133
134                    $("div.jqZoomPup").css({ top: ypos,left: xpos });
135
136                    }
137
138
139
140					scrolly = ypos;
141
142					$("div.zoomdiv").get(0).scrollTop = scrolly * scaley;
143
144					scrollx = xpos;
145
146					$("div.zoomdiv").get(0).scrollLeft = (scrollx) * scalex ;
147
148
149				    });
150		    },function(){
151
152               $(this).children("img").attr("alt",noalt);
153		       $(document.body).unbind("mousemove");
154		       if(settings.lens){
155		       $("div.jqZoomPup").remove();
156		       }
157		       $("div.zoomdiv").remove();
158
159		    });
160
161        count = 0;
162		}
163
164})(jQuery);
165
166function MouseEvent(e) {
167this.x = e.pageX
168this.y = e.pageY
169
170
171}
172