//图象按比例

<script language="JavaScript">
<!--
//图片按比例缩放
var flag=false;
function DrawImage(ImgD){
var image=new Image();
var iwidth = 80;  //定义允许图片宽度
var iheight = 80;  //定义允许图片高度
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= iwidth/iheight){
  if(image.width>iwidth){  
   ImgD.width=iwidth;
   ImgD.height=(image.height*iwidth)/image.width;
   }else{
   ImgD.width=image.width;  
   ImgD.height=image.height;
   }
   ImgD.alt=image.width+"×"+image.height;
   }
else{
  if(image.height>iheight){  
   ImgD.height=iheight;
   ImgD.width=(image.width*iheight)/image.height;  
   }else{
   ImgD.width=image.width;  
   ImgD.height=image.height;
   }
   ImgD.alt=image.width+"×"+image.height;
   }
}
}
//-->
</script>
<img src=".." onload = "DrawImage(this)">

//细线SELECT

<span style="border:1px solid #000000; position:absolute; overflow:hidden;" >
<select style="margin:-2px;">
<option>1111</option>
<option>11111111111111</option>
<option>111111111</option>
</select></span>

//Import

function Import() {
for( var i=0; i<arguments.length; i++ ) {
  var file = arguments[i];
  if ( file.match(/.js$/i))
    document.write('<script type="text/javascript" src="' + file + '"></sc' + 'ript>');
   else
    document.write('<style type="text/css">@import "' + file + '" ;</style>');
}
};

//js枚举

function getComputerName()
{
var objWMIService = GetObject("Winmgmts:rootcimv2");
for(e = new Enumerator(objWMIService) ; !e.atEnd() ; e.moveNext())
{
    var getComputer = e.item();
    return getComputer.Name;
}
}

//条件编译

<script language=javascript>
/*@cc_on @*/
/*@if (@_win32 && @_jscript_version>5)
function window.confirm(str)
{
     execScript("n = msgbox('"+ str +"', 257)", "vbscript");
     return(n == 1);
}
@end @*/
</script>

//取得innerText

<SCRIPT LANGUAGE="JavaScript">
<!--
var xmlDoc = new ActiveXObject("Msxml2.DOMDocument.4.0");
var currNode;
xmlDoc.async = false;
xmlDoc.async = false;
xmlDoc.loadXML("<TABLENAME>      你好你阿三    大法     司法等四               </TABLENAME>");
currNode = xmlDoc.documentElement;
   
  var s = currNode.xml;
  var r = /<([^>s]*?)[^>]*?>([^<]*?)</1>/
  var b = s.replace(r,"$2");
   alert(b);
//-->
</SCRIPT>

//mergeAttributes 复制所有读/写标签属性到指定元素。

<SCRIPT>
function fnMerge(){
oSource.children[1].mergeAttributes(oSource.children[0]);
}
</SCRIPT>
<SPAN ID=oSource>
<DIV
ID="oDiv"
ATTRIBUTE1="true"
ATTRIBUTE2="true"
onclick="alert('click');"
onmouseover="this.style.color='#0000FF';"
onmouseout="this.style.color='#000000';"
>
This is a sample <B>DIV</B> element.
</DIV>
<DIV ID="oDiv2">
This is another sample <B>DIV</B> element.
</DIV>
</SPAN>
<INPUT
TYPE="button"
VALUE="Merge Attributes"
onclick="fnMerge()"
>