function splitPage(requestPage,totalPage) {
	if( requestPage == 1 ) {
		document.all.firstPage.style.visibility="hidden";
		document.all.previousPage.style.visibility="hidden";
	}else {
		document.all.firstPage.style.visibility="visible";
		document.all.previousPage.style.visibility="visible";
	}
			
	if( requestPage < totalPage ) {
		document.all.lastPage.style.visibility="visible";
		document.all.nextPage.style.visibility="visible";
	}else {
		document.all.lastPage.style.visibility="hidden";
		document.all.nextPage.style.visibility="hidden";
	}
}

function copyToClipboard(txt) 
{        
     if(window.clipboardData)
     {
        window.clipboardData.clearData(); 
        window.clipboardData.setData("Text", txt);
        alert("复制成功！")
     } 
     else if(navigator.userAgent.indexOf("Opera") != -1) 
     {
        window.location = txt;
     }
     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("复制成功！") 
     } 
}