JavaScript - Hyperlink Position

I am creating calander control for the 1 year using javascript.the day in which click a table is pop up at absloute position . i want table is popup at relative position where selected date is click.

Here is my code

<script language="javascript" type="text/javascript">
var k=0;
var month;
var pagedata;
var check=0;
var tabledata = '';
var counter = 0;
var editVal=0;
var editRow=0;
var selecteditemcode="";
var counter=0;

function day_title(day_name)
{

mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode(String(day_name));
mycurrent_cell.appendChild(currenttext);

}


function makeArray(n)
{
this.length=n;
for (var i = 1; i <= n; i++)
this[i] = 0
return this
}
var flag=false;
var index;
var tempdata;
var mybody ;
var rowData = new Array();
var colData = new Array();
var mytable

function fill_table(m_name,m_length,mm)
{
counter+=1;

if(k==0)
{
alert(this_month);
k=this_month;

}
else
{

alert(k);
k +=1;
if(k>12)
{
alert(k);
alert(this_year);
if(flag==false)
{

this_year+=1;
flag=true;
alert("IN "+k);
alert("IN "+this_year);
}
}

}
mybody = document.getElementById('showtb');
mytable= document.createElement("table");

mytable.setAttribute("id",+String(m_name)+"_"+String(this_year));
mytablebody = document.createElement("tbody");
head_row = document.createElement("tr");

head_cell = document.createElement("td");
headtext = document.createTextNode(String(m_name)+"_"+String(this_year));


head_cell.appendChild(headtext);
head_cell.setAttribute('colSpan','7');

head_row.appendChild(head_cell);
head_cell.setAttribute('className','titlebar');
head_row.appendChild(head_cell);
mytablebody.appendChild(head_row);

mycurrent_row = document.createElement("tr");
counter+=1;
mycurrent_row.setAttribute("id",String(counter));
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode("Sun");
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode("Mon");
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode("Tue");
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode("Wed");
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode("Thu");
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode("Fri");
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode("Sat");
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);

mytablebody.appendChild(mycurrent_row);


day=1

if(m_name=="February" )
{

if((this_year%4)==0)
{
m_length +=1;

}

}

pagedata='';
var ddl;
counter +=2;
mycurrent_row = document.createElement("tr");
mycurrent_row.setAttribute("id",counter);

for (var i=1;i<start_day;i++) {


if(start_day<8)
{
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode(" ");
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
mycurrent_cell.setAttribute('className','promptbox');
mycurrent_row.appendChild(mycurrent_cell);
}




}
var blnFlagFirstline=false;

for (var i=start_day;i<8;i++) {



blnFlagFirstline=true;
alert("this_day "+ this_day+ " i "+ i);

if(blgFlagButtons==false)
{
if(this_day <=day)
{

mycurrent_cell = document.createElement("td");

currenttext = document.createElement("a");
currenttext.setAttribute("href", "javascript:fnDivertedFlight();");
currenttext.setAttribute("onClick","this.blur();");

var txt = document.createTextNode(""+String(day));

currenttext.appendChild(txt);

mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
blgFlagButtons=true;
}
else
{
if(blgFlagButtons==false)
{
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode(""+String(day));
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
}
else
{
mycurrent_cell = document.createElement("td");

currenttext = document.createElement("a");
currenttext.setAttribute("href", "javascript:fnDivertedFlight();");
currenttext.setAttribute("onClick","this.blur();");
var txt = document.createTextNode(""+String(day));

currenttext.appendChild(txt);

mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);

}
}
}
else
{
mycurrent_cell = document.createElement("td");
currenttext = document.createElement("a");
currenttext.setAttribute("href", "javascript:fnDivertedFlight();");
currenttext.setAttribute("onClick","this.blur();");
var txt = document.createTextNode(""+String(day));

currenttext.appendChild(txt);

mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);

}

day++;


}
if(blnFlagFirstline==true)
{
mytablebody.appendChild(mycurrent_row);
}


counter+=1;
mycurrent_row = document.createElement("tr");
mycurrent_row.setAttribute("id",counter);
while (day <= m_length) {
for (var i=1;i<=7 && day<=m_length;i++) {


if(blgFlagButtons==false)
{
if(this_day <=day)
{
mycurrent_cell = document.createElement("td");
currenttext = document.createElement("a");
currenttext.setAttribute("href", "javascript:fnDivertedFlight();");
currenttext.setAttribute("onClick","this.blur();");
var txt = document.createTextNode(""+String(day));

currenttext.appendChild(txt);

mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
blgFlagButtons=true;

}
else
{
mycurrent_cell = document.createElement("td");
currenttext = document.createTextNode(String(day));
mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);

}

}
else
{
mycurrent_cell = document.createElement("td");

currenttext = document.createElement("a");
currenttext.setAttribute("href", "javascript:fnDivertedFlight();");
currenttext.setAttribute("onClick","this.blur();");
var txt = document.createTextNode(""+String(day));

currenttext.appendChild(txt);

mycurrent_cell.appendChild(currenttext);
mycurrent_row.appendChild(mycurrent_cell);
}


day++
}
mytablebody.appendChild(mycurrent_row);

counter+=1;
mycurrent_row = document.createElement("tr");
mycurrent_row.setAttribute("id",counter);
}


mytable.appendChild(mytablebody);
mybody.appendChild(mytable);
mytable.setAttribute("border", "10");
//mytable.style.background="aliceblue";
mytable.style.fontFamily="Verdana";
//mytable.style.width="1000px";
mytable.setAttribute("className","promptbox");
mytable.style.fontSize="10pt";
start_day = i



}


var blgFlagButtons;
function fnCalender()
{
blgFlagButtons=false;
month=new makeArray(12)
month[1]="January"
month[2]="February"
month[3]="March"
month[4]="April"
month[5]="May"
month[6]="June"
month[7]="July"
month[8]="August"
month[9]="September"
month[10]="October"
month[11]="November"
month[12]="December"

month_length = new makeArray(12)
month_length[1]=31
month_length[2]=28
month_length[3]=31
month_length[4]=30
month_length[5]=31
month_length[6]=30
month_length[7]=31
month_length[8]=31
month_length[9]=30
month_length[10]=31
month_length[11]=30
month_length[12]=31

today = new Date()

today= new Date("July 13, 2008");//'Wed Oct 29 00:00:00 UTC+530 2008'



this_day = today.getDate()

this_month = today.getMonth()+1


this_year = today.getYear()
this_year = (this_year< 1000) ? this_year + 1900 : this_year;



begin_date = new Date("July 01, "+this_year)

if((this_year%4)==0)
{
start_day = begin_date.getDay()+1
}
else
{
start_day = begin_date.getDay()+1
}


var MhVal;

if(this_day>1)
{

MhVal=this_month;
for(var i=1; i<=13;i++)
{

mon[i]=month[MhVal];
monlen[i]=month_length[MhVal]
MhVal +=1
if(MhVal==13)
{
MhVal=1;
}

}
}
else
{
MhVal=this_month;

for(var i=1; i<=12;i++)
{

mon[i]=month[MhVal];
monlen[i]=month_length[MhVal]
MhVal +=1
if(MhVal==13)
{
MhVal=1;
}

}



}



if (start_day == 1){
start_day = 8
}

if(this_day>1)
{
for (var m = 1;m<=13;m++){
//alert('month[m] - '+mon[m]+' month_length[m] - '+monlen[m]+' m - ' +m);
fill_table(mon[m],monlen[m],m)


// tabledata += "id"+counter+"="+pagedata;
}
}
else
{
for (var n = 1;n<=12;n++){

fill_table(mon[n],monlen[n],n)


}
}


}

</script>

<script language="javascript" type="text/javascript">

function fnDivertedFlight()
{

prompt3('', 'Roster','Diverted Flight Detail </B>', 'fnDivertedValues');

}


function prompt3(promptpicture, prompttitle, message, sendto) {



var posx = 0;
var posy = 0;
var e = window.event;

if(e!=null)
{

if (e.pageX || e.pageY)
{
posx = e.pageX;
posy = e.pageY;
}

else if (e.clientX || e.clientY)
{
posx = e.clientX + document.body.scrollLeft
+ document.documentElement.scrollLeft;
posy = e.clientY + document.body.scrollTop
+ document.documentElement.scrollTop;
}
}
else

{
posx = 100;
posy = 100;


}




promptbox = document.createElement('div');

promptbox.setAttribute ('id' , 'prompt')

document.getElementsByTagName('body')[0].appendChild(promptbox)

promptbox = eval("document.getElementById('prompt').style")

promptbox.position = 'absolute'

promptbox.top = posy

promptbox.left = posx

promptbox.width = 430

promptbox.border = 'outset 1 #bbbbbb'

//Here I am open popup Tabletable
}

function fnDivertedValues(value1,value2,value3,value4,value6,value7,value5)
{


alert(value1+" , "+ value2+" , "+value3+" , "+value4+" , "+value5);