Proportional image scale-down horizontal/vertical center native javascript Effect

Source: Internet
Author: User

Proportional image scale-down horizontal/vertical center native javascript Effect

Idle, write a div box with a fixed width and height using native javascript, and scale down the image.

In addition to the horizontal/vertical center javascript special effects, I hope it will be useful to all of you, or what should I do. 0.0

<Script type = "text/javascript">

Function showImgH_W2 (tr, qW, qH ){

Var sdgH, sdgW, j2;

SdgW = tr. width;

SdgH = tr. height;

If (sdgW> sdgH ){

Tr. style. width = qW + "px ";


// Var rr = qH;

J2 = (qH-(qW/sdgW) * sdgH)/2;

If (j2> 0)

Tr. style. paddingTop = j2 + "px ";


Else {

Tr. style. height = qH + "px ";

// Var rr = 200;

J2 = (qW-(qH/sdgH) * sdgW)/2;

If (j2> 0)

Tr. style. paddingLeft = j2 + "px ";




// Window. onload = showImgH_W;


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