从字符串中提取超链接地址
现有如下文本(只列出一小部分): 
 function   checksq() 
 { 
 if   (document.sq.user.value.length <1) 
 		{alert( "请输入用户信息! "); 
 return   false;} 
 return   true;} 
 function   check() 
 { 
 if   (document.se.text.value.length <1) 
 		{alert( "请输入关键字! "); 
 		return   false;} 
 return   true; 
 } 
 //-->  
  <!--// 
 function   check0() 
 { 
 if   ((document.jstj.sm.value.length <1)   &&      (document.jstj.zz.value.length <1)   &&      (document.jstj.cbs.value.length <1)   &&      (document.jstj.cbrq.value.length <1)   ) 
 { 
 		alert( "请输入检索信息! "); 
 		return   false; 
 		} 
 	return   true; 
  <img   src= "images/folder.gif ">  <span   class= "p6 ">  <font   color= "#669900 "> yinqsj </font>  </span>  <br>  
                                                        <img   src= "images/yd.gif "   width= "11 "   height= "14 ">  <a   href=rcount.asp?ssnum=1002> yued </a>   
                                                        <img   src= "images/down.gif "   width= "11 "   height= "14 ">  <a   href=dcount.asp?ssnum=1002> xiaz </a>                                                           
                                                        <img   src= "images/pl.gif "   width= "11 "   height= "14 ">  <a   href=guestbook/index.asp?ssnum=1002&bookname=yinqsj发表评论 </a>   
                                                        <img   src= "images/sq.gif "   width= "11 "   height= "14 ">  <a   href=sq/add.asp?ssnum=1002&bookname=yinqsj   > 添加个人书签 </a>     </font>     
                                                        </span>  </td>    
  <img   src= "images/down.gif "   width= "11 "   height= "14 ">  <a   href=dcount.asp?ssnum=2745> xiaz </a>   
  <img   src= "images/folder.gif ">  <span   class= "p6 ">  <font   color= "#669900 "> yinqsj </font>  </span>  <br>  
  <img   src= "images/down.gif "   width= "11 "   height= "14 ">  <a   href=dcount.asp?ssnum=1279> xiaz </a>     
 .......     
 现要提取出所有xiaz所在行的 "dcount.asp?ssnum=XXXX ",   如何修改如下处理代码才能达到目的:     
  <html>  
  <head>  
  <title> 从字符串中提取超链接地址(by   howwa@sina.com) </>  </title>  
  <META   http-equiv=Content-Type   content= "text/html;   charset=gb2312 ">  
  <script   language=javascript>  
 // <!-- 
 function   getHrefs(str)   { 
       var