JavaScript日历突出显示特定日期

Question

嗨，这是我在这里的第一篇文章。我有点卡住了。我有这个JavaScript日历，我希望通过红色显示特定日期（例如：2015年6月5日和2015年6月9日）。我还想添加一个日期的超链接。抱歉，长代码。

    <script type="text/javascript">

    <!-- Begin
    function maxDays(mm, yyyy){
    var mDay;
    	if((mm == 3) || (mm == 5) || (mm == 8) || (mm == 10)){
    		mDay = 30;
      	}
      	else{
      		mDay = 31
      		if(mm == 1){
       			if (yyyy/4 - parseInt(yyyy/4) != 0){
       				mDay = 28
       			}
    		   	else{
       				mDay = 29
      			}
    		}
      }
    return mDay;
    }
    function changeBg(id){
    	if (eval(id).style.backgroundColor != "#ffffff"){
    		eval(id).style.backgroundColor = "#ffffff"
    	}
    	else{
    		eval(id).style.backgroundColor = "#ffffff"
    	}
    }
    function writeCalendar(){
    var now = new Date
    var dd = now.getDate()
    var mm = now.getMonth()
    var dow = now.getDay()
    var yyyy = now.getFullYear()
    var arrM  = new Array("January","February","March","April","May","June","July","August","September","October","November","December")
    var arrY = new Array()
    	for (ii=0;ii<=4;ii++){
    		arrY[ii] = yyyy - 2 + ii
    	}
    var arrD = new Array(
    "&nbsp;&nbspS&nbsp;&nbsp","&nbsp;&nbspM&nbsp;&nbsp","&nbsp;&nbspT&nbsp;&nbsp","&nbsp;&nbspW&nbsp;&nbsp","&nbsp;&nbspT&nbsp;&nbsp","&nbsp;&nbspF&nbsp;&nbsp","&nbsp;&nbspS&nbsp;&nbsp;")

    var text = ""
    text = "<form name=calForm>"
    text += "<table border=1>"
    text += "<tr><td>"
    text += "<table width=100%><tr>"
    text += "<td align=left>"
    text += "<select name=selMonth onChange='changeCal()'>"
    	for (ii=0;ii<=11;ii++){
    		if (ii==mm){
    			text += "<option value= " + ii + " Selected>" + arrM[ii] + "</option>"
    		}
    		else{
    			text += "<option value= " + ii + ">" + arrM[ii] + "</option>"
    		}
    	}
    text += "</select>"
    text += "</td>"
    text += "<td align=right>"
    text += "<select name=selYear onChange='changeCal()'>"
    	for (ii=0;ii<=4;ii++){
    		if (ii==2){
    			text += "<option value= " + arrY[ii] + " Selected>" + arrY[ii] + "</option>"
    		}
    		else{
    			text += "<option value= " + arrY[ii] + ">" + arrY[ii] + "</option>"
    		}
    	}
    text += "</select>"
    text += "</td>"
    text += "</tr></table>"
    text += "</td></tr>"
    text += "<tr><td>"
    text += "<table border=1>"
    text += "<tr>"
    	for (ii=0;ii<=6;ii++){
    		text += "<td align=center><span class=label>" + arrD[ii] + "</span></td>"
    	}
    text += "</tr>"
    aa = 0
    	for (kk=0;kk<=5;kk++){
    		text += "<tr>"
    		for (ii=0;ii<=6;ii++){
    			text += "<td align=center><span id=sp" + aa + " onClick='changeBg(this.id)'>1</span></td>"
    			aa += 1
    		}
    		text += "</tr>"
    	}
    text += "</table>"
    text += "</td></tr>"
    text += "</table>"
    text += "</form>"
    document.write(text)
    changeCal()
    }
    function changeCal(){
    var now = new Date
    var dd = now.getDate()
    var mm = now.getMonth()
    var dow = now.getDay()
    var yyyy = now.getFullYear()
    var currM = parseInt(document.calForm.selMonth.value)
    var prevM
    	if (currM!=0){
    		prevM = currM - 1
    	}
    	else{
    		prevM = 11
    	}
    var currY = parseInt(document.calForm.selYear.value)
    var mmyyyy = new Date()
    mmyyyy.setFullYear(currY)
    mmyyyy.setMonth(currM)
    mmyyyy.setDate(1)
    var day1 = mmyyyy.getDay()
    	if (day1 == 0){
    		day1 = 7
    	}
    var arrN = new Array(41)
    var aa
    	for (ii=0;ii<day1;ii++){
    		arrN[ii] = maxDays((prevM),currY) - day1 + ii + 1
    	}
    	aa = 1
    	for (ii=day1;ii<=day1+maxDays(currM,currY)-1;ii++){
    		arrN[ii] = aa
    		aa += 1
    	}
    	aa = 1
    	for (ii=day1+maxDays(currM,currY);ii<=41;ii++){
    		arrN[ii] = aa
    		aa += 1
    	}
    	for (ii=0;ii<=41;ii++){
    		eval("sp"+ii).style.backgroundColor = "#FFFFFF"
    	}
    var dCount = 0
    	for (ii=0;ii<=41;ii++){
    		if (((ii<7)&&(arrN[ii]>20))||((ii>27)&&(arrN[ii]<20))){
    			eval("sp"+ii).innerHTML = arrN[ii]
    			eval("sp"+ii).className = "c3"
    		}
    		else{
    			eval("sp"+ii).innerHTML = arrN[ii]
    			if ((dCount==0)||(dCount==6)){
    				eval("sp"+ii).className = "c2"
    			}
    			else{
    				eval("sp"+ii).className = "c1"
    			}
    			if ((arrN[ii]==dd)&&(mm==currM)&&(yyyy==currY)){
    				eval("sp"+ii).style.color="#0079c1";
    				
    			}
    		}
    			


    		
    	dCount += 1
    		if (dCount>6){
    			dCount=0
    		}
    	}
    }

    //  End -->
    </script>