function  getWorkRange(obj){
 obj.focus();
 var  workRange=document.selection.createRange();
 var  allRange=obj.createTextRange();
 //len=workRange.text.length;
 //alert("select text: "+ allRange.text);
}

function onBold(obj)
{
	 obj.focus();
	 var  workRange=document.selection.createRange();
	 //var  allRange=obj.createTextRange();
	 //workRange.setEndPoint("StartToStart",allRange);

	 if(workRange.text)
		 workRange.text = "[b]"+workRange.text+"[/b]";
	 else
		 alert("请先选中文字!");
	//obj.value = str;
}

function onItalic(obj)
{
	obj.focus();
	 var  workRange=document.selection.createRange();
	if(workRange.text)
		 workRange.text = "[i]"+workRange.text+"[/i]";
	 else
		 alert("请先选中文字!");
}

function onUnderline(obj)
{
	obj.focus();
	 var  workRange=document.selection.createRange();
	if(workRange.text)
		 workRange.text = "[u]"+workRange.text+"[/u]";
	 else
		 alert("请先选中文字!");
}

function onHyperLink(obj)
{

	var str = prompt("请输入超链接地址):",  "http:\/\/");

	if ((str != null) && (str != "http://"))
	{

		obj.focus();
		 var  workRange=document.selection.createRange();
		if(workRange.text)
			 workRange.text = "[url="+str+"]"+workRange.text+"[/url]";
		 else{
			 str = "[url]"+str+"[/url]";
		//str = "[url]"+str+"[/url]";
			obj.value = obj.value + str;
		 }
	}
}

function onImage()
{
var str = prompt("请输入图片的超链接):", "http:\/\/");

if ((str != null) && (str != "http://"))
{
	str = "\n[img]"+str+"[/img]\n";
	document.getElementById("thebody").value = document.getElementById("thebody").value + str;
}
}
function openme(obj)
{
	obj.style.background="#CCCCCC";
}
function closeme(obj)
{
	obj.style.background="";
}

function onMedia() {
    var str = prompt("请输入视频地址):", "");

    if ((str != null) && str.length>0) {
        str = "\n[media width=\"320\" height=\"260\"]"+str+"[/media]\n";
        document.getElementById("thebody").value = document.getElementById("thebody").value + str;
    }
}

function onRm() {
    var str = prompt("请输入视频地址):", "");

    if ((str != null) && str.length>0) {
        str = "\n[rm width=\"340\" height=\"260\"]"+str+"[/rm]\n";
        document.getElementById("thebody").value = document.getElementById("thebody").value + str;
    }
}