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Jquery image proportional scaling and Chrome image loading problems

Source: Internet
Author: User
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You only need to use a jquery images plug-in to implement image proportional scaling in jquery. However, incompatibility with this plug-in chrome will cause image loading failure, therefore, we only need to make a simple judgment to solve this problem.

Images. js File

The Code is as follows: Copy code

Function ResizeImage (obj, color ){
If (obj. length> 1) {alert ('select error'); return ;}
If (color = undefined) {color = '# ffff ';}
Var width = obj. attr ('oldwidth ');
Var height = obj. attr ('oldheight ');
If (width = undefined) {width = obj. attr ('width'); height = obj. attr ('height ');}
Var pos = obj. attr ('pos ');
If (pos = undefined) {pos = 0 ;}
Var src = obj. attr ('src ');
Var img = new Image ();
Img. src = src;
Var oldwidth = img. width;
Var oldheight = img. height;
Var pw = width/oldwidth;
Var ph = height/oldheight;
Var left = 0;
Var top = 0;
If (pw <ph ){
Img. width = width;
Img. height = oldheight * pw;
Top = parseInt (height-img.height)/2 );
} Else {
Img. height = height;
Img. width = oldwidth * ph;
Left = parseInt (width-img.width)/2 );
}
Obj. attr ('width', img. width );
Obj. attr ('height', img. height );
Obj. attr ('oldwidth ', width );
Obj. attr ('oldheight', height );
Obj. attr ('src', img. src );
Obj.css ('position', 'absolute ');
Obj.css ('left', left );
If(pos=%1%%obj.css ('bottom ', 0 );}
If(pos=%0%%%obj.css ('top', top );}
If(pos1_1_-11_1_obj.css ('top', 0 )}
// Package
If (obj. parent ("div [autosize = 'yes']"). length = 0 ){
Var div = document. createElement ('div ');
Dimensions (div).css ('width', width );
Dimensions (div).css ('height', height );
Watermark (div).css ('position', 'relative ');
Vertex (div).css ('border', 'None ');
$ (Div). attr ('autosize', 'yes ');
Watermark (div).css ('background-color', color );
Obj. wrap (div );
}
Delete img;
}
JQuery. fn. extend ({
Autosize: function (color ){
This. each (function (){
ResizeImage ($ (this), color );
})
}
});

Html code

The Code is as follows: Copy code
<Html>
<Head>
<Title> corn string www. bKjia. c0m </title>
<Script type = "text/javascript" src = "jquery. js" charset = "UTF-8"> </script>
<Script type = "text/javascript" src = "image. js" charset = "UTF-8"> </script>
</Head>
<Body>
<Div>

</Div>
<Script type = "text/javascript">
$ (Function (){
If ($. browser. webkit ){
$ ("Img. autosize"). load (function (){
$ (This). autosize ();
})
} Else {
$ ("Img. autosize"). autosize ();
}
});
</Script>
</Body>
</Html>

Note that the Chorme browser is special in the image loading mechanism, which sometimes fails to get the width and height of the image, thus affecting js operations.
Let's say we should first use the $. browser. webkit method of Jquery to determine whether the browser is a Google browser, and then use the. load () method to load the image and then perform the corresponding operations.

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Related Keywords:
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