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Use javascript to browse the big picture code in a small box

Source: Internet
Author: User
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<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>
<Title> untitled document </title>
<Style type = "text/css">
<! --
# Pic {
Height: 300px;
Width: 420px;
Border: 3px solid # ccc;
Background-image: url (http://www.happyshow.org/sample/20060619/3.jpg );
Background-repeat: no-repeat;
Background-position: 0px 0px;
Background-color: #333;
Cursor: crosshair;
}
-->
</Style>
<Script type = "text/javascript">
<! --
Var p = new Array ();
Var speed = 1.0; // 1 indicates a speed of 1 times, that is, the original speed.
Var x, y // coordinates of the background when the mouse clicks down
Var x_new, y_new // displacement
Function getmouseposition (event)
{
If (document. all)
{
X = document. body. scrollLeft + event. clientX;
Y = document. body. scrollTop + event. clientY;
} Else
{
X = event. layerX;
Y = event. layerY;
}
}
Function setmouseposition (event)
{
If (document. getElementById ('pic '). style. backgroundPosition. length = 0)
{Document. getElementById ('pic '). style. backgroundPosition = "0px 0px ";}
P = document. getElementById ('pic '). style. backgroundPosition. split ("")
If (document. all)
{
X_new = document. body. scrollLeft + event. clientX;
Y_new = document. body. scrollTop + event. clientY;
} Else
{
X_new = event. layerX;
Y_new = event. layerY;
}

X2 = (speed * (x_new-x) + parseInt (p [0]). toString (10); // calculates the displacement
Y2 = (speed * (y_new-y) + parseInt (p [1]). toString (10 );
Document. getElementById ('pic '). style. backgroundPosition = x2 + "px" + y2 + "px ";
}
-->
</Script>
</Head>
<Body>
<Div id = "pic" onmousedown = "getmouseposition (event)" onmouseup = "setmouseposition (event)"> </div>
Today, I am playing google earth 4.0b and found that the Print Screen has a large image. If I put it on a webpage directly, it is not suitable because it is too large and I don't want to compress the image size, as a result, I thought of this method and did not expect it to be easier to implement it than I expected. Oh, damn it, this code is also compatible with firefox.
</Body>
</Html>
Today, I am playing google earth 4.0b and found that the Print Screen has a large image size. If I don't want to compress the image size when I put it on a webpage, I thought of this method, it was easier to implement than expected. Oh, damn it, this code is also compatible with firefox.

Bytes --------------------------------------------------------------------------------------
2006.6.20 modification:

· Added a rolling range without a background
· The onmousemove event is used to move an image as the mouse moves in real time.

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>
<Title> untitled document </title>
<Style type = "text/css">
<! --
# Pic {
Width: 420px;
Height: 300px;
Border: 3px solid # ccc;
Background-image: url (http://www.happyshow.org/sample/20060619/3.jpg );
Background-repeat: no-repeat;
Background-position: 0px 0px;
Cursor: move;
}
-->
</Style>
<Script type = "text/javascript">
<! --
Var p = new Array ();
Var speed = 0.05; // speed
Var picWidth = 1280; // the width and height of the big image
Var picHeight = 971;
Var x, y // coordinates of the background when the mouse clicks down
Var x_new, y_new // displacement
Var haveclick = false;
Function getmouseposition (event)
{
If (document. all)
{
X = document. body. scrollLeft + event. clientX;
Y = document. body. scrollTop + event. clientY;
} Else
{
X = event. layerX;
Y = event. layerY;
}
Haveclick = true;
}
Function movestop ()
{
Haveclick = false;
}
Function movestart (event)
{
If (haveclick)
{
If (document. getElementById ('pic '). style. backgroundPosition. length = 0)
{Document. getElementById ('pic '). style. backgroundPosition = "0px 0px ";}
P = document. getElementById ('pic '). style. backgroundPosition. split ("")
If (document. all)
{
X_new = document. body. scrollLeft + event. clientX;
Y_new = document. body. scrollTop + event. clientY;
} Else
{
X_new = event. layerX;
Y_new = event. layerY;
}

X2 = (speed * (x_new-x) + parseInt (p [0]). toString (10); // calculates the displacement
Y2 = (speed * (y_new-y) + parseInt (p [1]). toString (10 );

If (x2 <-picWidth + 420) x2 =-picWidth + 420;
If (y2> 0) y2 = 0;
If (x2> 0) x2 = 0;
If (2' <-picHeight + 300) y2 =-picHeight + 300;
Document. getElementById ('pic '). style. backgroundPosition = x2 + "px" + y2 + "px ";
}
}
-->
</Script>
</Head>
<Body>
<Div id = "pic" onmousedown = "getmouseposition (event)" onmousemove = "movestart (event)" onmouseup = "movestop ()" onmouseout = "movestop () "> </div>
</Body>
</Html>

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