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JS control the size of the picture display (picture, etc. scale)

Source: Internet
Author: User
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Http://www.cnblogs.com/xiaochaohuashengmi/archive/2010/06/01/1749571.html

Code highlighting produced by Actipro Codehighlighter (freeware) http://www.codehighlighter.com/--><! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title> latest JavaScript automatically proportionally displays pictures, proportionally compresses picture display </title>
<script type= "Text/javascript" >
function Autoresizeimage (maxwidth,maxheight,objimg) {
var img = new Image ();
IMG.SRC = OBJIMG.SRC;
var hratio;
var wratio;
var Ratio = 1;
var w = img.width;
var h = img.height;
Wratio = maxwidth/w;
Hratio = maxheight/h;
if (maxWidth ==0 && maxheight==0) {
Ratio = 1;
}else if (maxwidth==0) {//
if (hratio<1) Ratio = Hratio;
}else if (maxheight==0) {
if (wratio<1) Ratio = Wratio;
}else if (wratio<1 | | hratio<1) {
Ratio = (wratio<=hratio?wratio:hratio);
}
if (ratio<1) {
w = w * Ratio;
H = h * Ratio;
}
Objimg.height = h;
Objimg.width = W;
}
</script>
<body>
<br/>
Original display (534 X) <br/>
Onload= "Autoresizeimage (0,0,this) <br/>
<a href= "Http://p.blog.csdn.net/images/p_blog_csdn_net/feng_sundy/421506/o_ 09925c7bcead8c60f683298dacf497a6.jpg "target=" _blank "></a><br/><br/>
1. Press width 250 compression, do not limit height proportionally to compress <br/>
Onload= "Autoresizeimage (250,0,this)" <br/>
<a href= "http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target= "_blank" ></a><br/><br/>
2. Press the height 250 compression, do not limit the width proportional compression <br/>
Onload= "Autoresizeimage (0,250,this)" <br/>
<a href= "http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target= "_blank" ></a><br/><br/>
3. Press the height 250 width 250 proportionally to compress the <br/>
Onload= "Autoresizeimage (250,250,this)" <br/>
<a href= "http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target= "_blank" ></a><br/><br/>
4. Aspect unequal proportional compression (X 512), when the height is constant, will automatically be compressed according to the height of the scale. <br/>
Onload= "Autoresizeimage (400,512,this)" <br/>
<a href= "http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target= "_blank" ></a><br/><br/>
5. Aspect unequal proportional compression (X 600), when the width is constant, will be automatically compressed by the proportion of the width. <br/>
Onload= "Autoresizeimage (300,600,this)" <br/>
<a href= "http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target= "_blank" ></a><br/><br/>
6. If the height and width of the picture are less than the maximum height and width of the compression, the picture will not be pulled up (shown by the original) <br/>
Original 444 x 207, compressed to x 600, will keep the original display <br/>
Onload= "Autoresizeimage (500,600,this)" <br/>
<a href= "http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target= "_blank" ></a><br/>< br/>
</body>

JS control the size of the picture display (picture, etc. scale)

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