function validateMode()
{
  if (!bTextMode) return true;
  alert("请先取消查看HTML源代码，进入“编辑”状态，然后再使用系统编辑功能!");
  message.focus();
  return false;
}
function validateModea()
{
  if (!bTextMode) return true;
  alert("请先取消查看HTML源代码!");
  message.focus();
  return false;
}

function sign()
{if (!validateMode()) return;
message.focus();

var range =message.document.selection.createRange();
str1="<font color='red'><b>|签收|</b>文件已经阅读</font>"
   range.pasteHTML(str1);
}

function img_zoom(e, o)		//图片鼠标滚轮缩放
{
	var zoom = parseInt(o.style.zoom, 10) || 100;
	zoom += event.wheelDelta / 12;
	if (zoom > 0) o.style.zoom = zoom + '%';
		return false;
}







<!--
function MM_preloadImages() { //v3.0
	var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
	var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
	if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
//-->





var size=14;			//字体大小

function fontZoom(fontsize){	//设置字体
	size=fontsize;
	document.getElementById('fontZoom').style.fontSize=size+'px';
}

function fontMax(){	//字体放大
	size=size+2;
	document.getElementById('fontZoom').style.fontSize=size+'px';
}

function fontMin(){	//字体缩小
	size=size-2;
	if (size < 2 ){
		size = 2
	}
	document.getElementById('fontZoom').style.fontSize=size+'px';
}






//双击滚屏代码
	var currentpos,timer;
	
	function initialize()
	{
	timer=setInterval("scrollwindow()",50);
	}
	
	function sc(){
	clearInterval(timer);
	}
	
	function scrollwindow()
	{
	currentpos=document.body.scrollTop;
	window.scroll(0,++currentpos);
	if (currentpos != document.body.scrollTop)
		sc();
	}
	document.onmousedown=sc
	document.ondblclick=initialize
	
	
	
	
	
	
	
<!--
  function do_color(vobject,vvar)
  { document.getElementById(vobject).style.color=vvar; }
  function do_zooms(vobject,vvar)
  { document.getElementById(vobject).style.fontsize=vvar+'px'; }
-->