function gotoSearch(){
	var searchInput=document.getElementById("input_serach");
	if(searchInput.value==''){
		alert("请输入搜索内容!");
		searchInput.focus();
		return false;
	}
	else{
	 	return true;
	}
}
//复制txt(链接)到剪贴板函数
function copyToClipboard(txt) {    
	   
    if(window.clipboardData) {           //IE浏览器 
  
              window.clipboardData.clearData();           
  
              window.clipboardData.setData("Text", txt);      
                
              alert("成功复制链接到剪贴板！")    
  
      } else if(navigator.userAgent.indexOf("Opera") != -1) {   //opera         
  
           window.location = txt;   
           
           alert("成功复制链接到剪贴板！")         
  
      } else if (window.netscape) {           
            try {           

  
                netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");           
  
           } catch (e) {           
  
                alert("被浏览器拒绝！\n请在浏览器地址栏输入'about:config'并回车\n然后将'signed.applets.codebase_principal_support'设置为'true'");           
  
           }           
  
          var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);           
  
          if (!clip)           
  
               return;           
  
          var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);           
  
          if (!trans)           
  
               return;           
  
           trans.addDataFlavor('text/unicode');           
  
          var str = new Object();           
  
          var len = new Object();           
  
          var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);           
  
          var copytext = txt;           
  
           str.data = copytext;           
  
           trans.setTransferData("text/unicode",str,copytext.length*2);           
  
          var clipid = Components.interfaces.nsIClipboard;           
  
          if (!clip)           
  
               return false;           
  
           clip.setData(trans,null,clipid.kGlobalClipboard);           
  
           alert("成功复制链接到剪贴板！")           
  
      }           
}