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我是JavaScript的新用戶。使用Javascript向下滾動對話框（窗口內的對話框）
我有一個打開對話框的網頁。我想語法向下滾動對話框，而不是主窗口。
我已經嘗試使用：
window.scrollTo(500,0);
但這向下滾動主窗口，而不是對話。
在對話框的HTML代碼如下所示：
<div id="moodle-dialogue-yui_3_17_2_2_1446976755272_806" role="dialog"
aria-labelledby="moodle-dialogue-yui_3_17_2_2_1446976755272_806-header-text"
class="moodle-dialogue-wrap moodle-dialogue-content yui3-widget-stdmod">
<div id="moodle-dialogue-yui_3_17_2_2_1446976755272_806-header-text" class="moodle-dialogue-hd yui3-widget-hd"
style="cursor: move;">Annotate PDF<span class="yui3-widget-buttons" id="yui_3_17_2_2_1446976755272_876"><button
class="yui3-button closebutton" title="Close"></button></span></div>
<div class="moodle-dialogue-bd yui3-widget-bd" id="yui_3_17_2_2_1446976755272_4561">
<div class="pageheader" id="yui_3_17_2_2_1446976755272_4608">
<div class="navigation" role="navigation">
<button disabled="true" class="navigate-previous-button" accesskey="j"><img alt="Previous page"
class="smallicon"
title="Previous page"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/nav_prev">
</button>
<select aria-label="Go to page" class="navigate-page-select" accesskey="k"
id="yui_3_17_2_2_1446976755272_994">
<option value="0">Page 1</option>
<option value="1">Page 2</option>
<option value="2">Page 3</option>
<option value="3">Page 4</option>
<option value="4">Page 5</option>
<option value="5">Page 6</option>
</select>
<button class="navigate-next-button" accesskey="l"><img alt="Next page" class="smallicon"
title="Next page"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/nav_next">
</button>
</div>
<div class="navigation-search" role="navigation">
<button data-tool="searchcomments" class="searchcommentsbutton" accesskey="h"><img
alt="searchcomments (Alt/Shift-Alt/Ctrl-Option + h)" class="smallicon"
title="searchcomments (Alt/Shift-Alt/Ctrl-Option + h)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/comment_search">
</button>
</div>
<div class="toolbar" role="toolbar">
<button data-tool="stamp" class="stampbutton" accesskey="n" aria-pressed="false"><img
alt="stamp (Alt/Shift-Alt/Ctrl-Option + n)" class="smallicon"
title="stamp (Alt/Shift-Alt/Ctrl-Option + n)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/stamp">
</button>
<button data-tool="currentstamp" class="currentstampbutton" accesskey="m"
id="yui_3_17_2_2_1446976755272_914"><img alt="currentstamp (Alt/Shift-Alt/Ctrl-Option + m)"
class="smallicon"
title="currentstamp (Alt/Shift-Alt/Ctrl-Option + m)"
src="http://moodle2.cs.huji.ac.il/nu15/pluginfile.php/345984/assignfeedback_editpdf/stamps/9333/cross.png"
height="16" width="16"></button>
</div>
<div class="toolbar" role="toolbar">
<button data-tool="pen" class="penbutton" accesskey="y" aria-pressed="false"><img
alt="pen (Alt/Shift-Alt/Ctrl-Option + y)" class="smallicon"
title="pen (Alt/Shift-Alt/Ctrl-Option + y)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/pen">
</button>
<button data-tool="line" class="linebutton" accesskey="u" aria-pressed="false"><img
alt="line (Alt/Shift-Alt/Ctrl-Option + u)" class="smallicon"
title="line (Alt/Shift-Alt/Ctrl-Option + u)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/line">
</button>
<button data-tool="rectangle" class="rectanglebutton" accesskey="i" aria-pressed="false"><img
alt="rectangle (Alt/Shift-Alt/Ctrl-Option + i)" class="smallicon"
title="rectangle (Alt/Shift-Alt/Ctrl-Option + i)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/rectangle">
</button>
<button data-tool="oval" class="ovalbutton" accesskey="o" aria-pressed="false"><img
alt="oval (Alt/Shift-Alt/Ctrl-Option + o)" class="smallicon"
title="oval (Alt/Shift-Alt/Ctrl-Option + o)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/oval">
</button>
<button data-tool="highlight" class="highlightbutton" accesskey="p" aria-pressed="false"><img
alt="highlight (Alt/Shift-Alt/Ctrl-Option + p)" class="smallicon"
title="highlight (Alt/Shift-Alt/Ctrl-Option + p)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/highlight">
</button>
<button data-tool="annotationcolour" class="annotationcolourbutton" accesskey="r"
id="yui_3_17_2_2_1446976755272_910"><img alt="annotationcolour (Alt/Shift-Alt/Ctrl-Option + r)"
class="smallicon"
title="annotationcolour (Alt/Shift-Alt/Ctrl-Option + r)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/colour_red">
</button>
</div>
<div class="toolbar" role="toolbar" id="yui_3_17_2_2_1446976755272_4607">
<button data-tool="select" class="selectbutton assignfeedback_editpdf_selectedbutton" accesskey="c"
aria-pressed="true" id="yui_3_17_2_2_1446976755272_4606"><img
alt="select (Alt/Shift-Alt/Ctrl-Option + c)" class="smallicon"
title="select (Alt/Shift-Alt/Ctrl-Option + c)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/select">
</button>
</div>
<div class="toolbar" role="toolbar">
<button data-tool="comment" class="commentbutton" accesskey="z" aria-pressed="false"><img
alt="comment (Alt/Shift-Alt/Ctrl-Option + z)" class="smallicon"
title="comment (Alt/Shift-Alt/Ctrl-Option + z)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/comment">
</button>
<button data-tool="commentcolour" class="commentcolourbutton" accesskey="x"
id="yui_3_17_2_2_1446976755272_907"><img alt="commentcolour (Alt/Shift-Alt/Ctrl-Option + x)"
class="smallicon"
title="commentcolour (Alt/Shift-Alt/Ctrl-Option + x)"
src="http://moodle2.cs.huji.ac.il/nu15/theme/image.php/formal_white/assignfeedback_editpdf/1446608318/background_colour_yellow"
style="border-style: solid;"></button>
</div>
<div class="clearfix"></div>
</div>
<div class="hideoverflow" id="yui_3_17_2_2_1446976755272_4560">
<div class="drawingregion" style="max-height: 786px;" id="yui_3_17_2_2_1446976755272_4559">
<div class="drawingcanvas"
style="width: 850px; height: 1100px; background-image: url(http://moodle2.cs.huji.ac.il/nu15/pluginfile.php/345984/assignfeedback_editpdf/pages/9333/image_page0.png);"
id="yui_3_17_2_2_1446976755272_4572">
<div class="loading" hidden="hidden" style="display: none;">
<div class="progress progress-info progress-striped active" title="Loading PDF editor"
role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100">
<div class="bar" style="width: 0%"></div>
</div>
<div class="progressbarlabel">Generating the PDF...</div>
</div>
<div style="position: absolute; left: 0px; top: 0px; visibility: visible;">
<svg:svg pointer-events="none" overflow="auto" id="yui_3_17_2_2_1446976755272_890"
style="position: absolute; top: 0px; left: 0px; overflow: auto; visibility: visible;"></svg:svg>
</div>
</div>
</div>
</div>
</div>
<div class="moodle-dialogue-ft yui3-widget-ft"></div>
設置對話框的頂部而不是滾動。 –