function SearchAddr() 
  {
    var key =document.getElementById("txtChannelA").value;
    if(key=="")
    {
       alert("Please input search key");
       return;
    }
    var url ="http://emap.eastday.com/EastDayMap.aspx?action=search&addr=" +encodeURIComponent(key) ;
    window.open(url);
  } 
 var doc ='<link href="http://emap.eastday.com/css/eastday.css" rel="stylesheet" type="text/css" /><div>'
          +'<table width="174" border="0" cellspacing="3" cellpadding="0" class="searchbox">'
		  +'<tr>'
		  +'  <td width="19"><img src="http://emap.eastday.com/images/mapicon.gif" width="19" height="18" /></td>'
		  +'  <td width="110"><div class="s1"><a href="http://emap.eastday.com/" target="blank" >Shanghai Map</a></div></td>'
		  +'  <td width="37">&nbsp;</td>'
		  +' </tr>'
		  +'<tr>'
		  +'  <td colspan="2"><input type="text" id="txtChannelA" size="40" /></td>'
		  +'  <td><a href="javascript:void(0)" onclick="SearchAddr()" ><img src="http://emap.eastday.com/images/go.gif" width="28" height="20" /></a></td>'
		  +'</tr>'
		  +'<tr>'
		  +'  <td colspan="3"><div class="s2">Find address and place of interest</div></td>'
		  +'</tr>' 
		  +'</table></div>';
 document.write(doc);