function bold(){
		if (navigator.appName.indexOf("Microsoft") != -1) {
			Qr=document.selection.createRange().text;
			if(!Qr || document.selection.createRange().parentElement().name!='content'){
				alert("請於內容輸入欄位中選取您要加粗之字元。");
			}else{
				document.selection.createRange().text='<b>'+document.selection.createRange().text+'</b>';
				document.selection.empty();
			}
		}else {
			var textBox = document.getElementById("content");
			var start = textBox.selectionStart;
			var end = textBox.selectionEnd;
			if(typeof(start) == "number"){
				var pre = textBox.value.substr(0, start);
				var mid = textBox.value.substring(start, end);
				var post = textBox.value.substr(end);
				textBox.value = pre+"<b>"+mid+"</b>"+post;
			}else{
				alert("請於內容輸入欄位中選取您要加粗之字元。");
			}
		}
	}

	
	function setSize(size){
		if (navigator.appName.indexOf("Microsoft") != -1) {
			Qr=document.selection.createRange().text;
			if(!Qr || document.selection.createRange().parentElement().name!='content'){
				alert("請於內容輸入欄位中選取您要加粗之字元。");
			}else{
				document.selection.createRange().text="<font size=\""+size+"\">"+document.selection.createRange().text+"</font>";
				document.selection.empty();
			}
		}else {
			var textBox = document.getElementById("content");
			var start = textBox.selectionStart;
			var end = textBox.selectionEnd;
			if(typeof(start) == "number"){
				var pre = textBox.value.substr(0, start);
				var mid = textBox.value.substring(start, end);
				var post = textBox.value.substr(end);
				textBox.value = pre+"<font size=\""+size+"\">"+mid+"</font>"+post;
			}else{
				alert("請於內容輸入欄位中選取您要加粗之字元。");
			}
		}
	}
	function underline(){
		if (navigator.appName.indexOf("Microsoft") != -1) {
			Qr=document.selection.createRange().text;
			if(!Qr || document.selection.createRange().parentElement().name!='content'){
				alert("請於內容輸入欄位中選取您要加粗之字元。");
			}else{
				document.selection.createRange().text='<u>'+document.selection.createRange().text+'</u>';
				document.selection.empty();
			}
		}else {
			var textBox = document.getElementById("content");
			var start = textBox.selectionStart;
			var end = textBox.selectionEnd;
			if(typeof(start) == "number"){
				var pre = textBox.value.substr(0, start);
				var mid = textBox.value.substring(start, end);
				var post = textBox.value.substr(end);
				textBox.value = pre+"<u>"+mid+"</u>"+post;
			}else{
				alert("請於內容輸入欄位中選取您要加粗之字元。");
			}
		}
	}
	function setColor(color){
		if (navigator.appName.indexOf("Microsoft") != -1) {
			Qr=document.selection.createRange().text;
			if(!Qr || document.selection.createRange().parentElement().name!='content'){
				alert("請於內容輸入欄位中選取您要加粗之字元。");
			}else{
				document.selection.createRange().text="<font color=\""+color+"\">"+document.selection.createRange().text+"</font>";
				document.selection.empty();
			}
		}else {
			var textBox = document.getElementById("content");
			var start = textBox.selectionStart;
			var end = textBox.selectionEnd;
			if(typeof(start) == "number"){
				var pre = textBox.value.substr(0, start);
				var mid = textBox.value.substring(start, end);
				var post = textBox.value.substr(end);
				textBox.value = pre+"<font color=\""+color+"\">"+mid+"</font>"+post;
			}else{
				alert("請於內容輸入欄位中選取您要加粗之字元。");
			}
		}
	}
	function setURL(){
		var url = document.getElementById('urlText').value;
		if (navigator.appName.indexOf("Microsoft") != -1) {
			Qr=document.selection.createRange().text;
			if(!Qr || document.selection.createRange().parentElement().name!='content'){
				alert("請於內容輸入欄位中選取您要加超連結之字元。");
			}else if(url == ""){
				alert("請輸入超連結。");
			}else{
				document.selection.createRange().text="<a href=\""+url+"\">"+document.selection.createRange().text+"</a>";
				document.selection.empty();
			}
		}else {
			var textBox = document.getElementById("content");
			var start = textBox.selectionStart;
			var end = textBox.selectionEnd;
			if(url == ""){
				alert("請輸入超連結。");
			}else if(typeof(start) == "number"){
				var pre = textBox.value.substr(0, start);
				var mid = textBox.value.substring(start, end);
				var post = textBox.value.substr(end);
				textBox.value = pre+"<a href=\""+url+"\">"+mid+"</a>"+post;
			}else{
				alert("請於內容輸入欄位中選取您要加超連結之字元。");
			}
		}
	}