JavaScript - Need To Find A Calender Script That Can Be Used More Than Once On The Same Page

function addRow()
{
var tbl = document.getElementById('tblMed');
var lastRow = tbl.rows.length;
var iteration = lastRow;
var row = tbl.insertRow(lastRow);

 var cellLeft = row.insertCell(0);
  var sl = document.createElement('input');
  sl.type = 'text';
  sl.name = 'sln' ;
  sl.id = 'sln' + iteration;
  sl.value = iteration;
  sl.size = 3;
  sl.readOnly = true;
  cellLeft.appendChild(sl);

var cellRights= row.insertCell(1);
var elm= document.createElement('input');
elm.type = 'text';
elm.name = 'txtMdesc' ;
elm.id = 'Mdesc' + iteration;
elm.size = 20;
cellRights.appendChild(elm);

var cellRightt= row.insertCell(2);
var elmn= document.createElement('input');
elmn.type = 'text';
elmn.name = 'txtMqty' ;
elmn.onclick = "cal1xx.select(document.forms[0].sdate,'anchor1xx','dd-MM-yy');
elmn.id = 'Mqty' + iteration;
elmn.size = 20;
cellRightt.appendChild(elmn)";

var cellRightu= row.insertCell(3);
var elmno= document.createElement('input');
elmno.type = 'text';
elmno.name = 'txtMbill' ;
elmno.id = 'Mbill' + iteration;
elmno.size = 20;
cellRightu.appendChild(elmno);

}

</br>
 <fieldset style="width:60%;" align="center"> <legend>


<SCRIPT LANGUAGE="JavaScript">
function deleteRow(b){
    document.getElementById('table_formcontainer').deleteRow(b)
}
function CompareDates1() 
{ 
	var str1  = document.getElementById("start").value;   
	var str2  = document.getElementById("edate").value;  
	var dt1   = parseInt(str1.substring(0,2),10);    
	var mon1  = parseInt(str1.substring(3,5),10);  
	var yr1   = parseInt(str1.substring(6,10),10);   
	var dt2   = parseInt(str2.substring(0,2),10);    
	var mon2  = parseInt(str2.substring(3,5),10);   
	var yr2   = parseInt(str2.substring(6,10),10);   
	var date1 = new Date(yr1, mon1, dt1);    
	var date2 = new Date(yr2, mon2, dt2);    
	if(date2 < date1)  
		{      
			alert("To date cannot be greater than from date");      
			return false;   
		}    
	else   
		{      
			alert("Submitting ...");     
			document.form1.submit();   
		} 
		return true;
}
function addRow()
{
var tbl = document.getElementById('tblMed');
var lastRow = tbl.rows.length;
var iteration = lastRow;
var row = tbl.insertRow(lastRow);

 var cellLeft = row.insertCell(0);
  var sl = document.createElement('input');
  sl.type = 'text';
  sl.name = 'sln' ;
  sl.id = 'sln' + iteration;
  sl.value = iteration;
  sl.size = 3;
  sl.readOnly = true;
  cellLeft.appendChild(sl);

var cellRights= row.insertCell(1);
var elm= document.createElement('input');
elm.type = 'text';
elm.name = 'txtMdesc' ;
elm.id = 'Mdesc' + iteration;
elm.size = 20;
cellRights.appendChild(elm);

var cellRightt= row.insertCell(2);
var elmn= document.createElement('input');
elmn.type = 'text';
elmn.name = 'txtMqty' ;
elmn.onclick = "cal1xx.select(document.forms[0].sdate,'anchor1xx','dd-MM-yy');
elmn.id = 'Mqty' + iteration;
elmn.size = 20;
cellRightt.appendChild(elmn)";

var cellRightu= row.insertCell(3);
var elmno= document.createElement('input');
elmno.type = 'text';
elmno.name = 'txtMbill' ;
elmno.id = 'Mbill' + iteration;
elmno.size = 20;
cellRightu.appendChild(elmno);

}

function delRow1(c)
{
    document.getElementById('tblMed').deleteRow(c)
}

function validate()
{
	
	var tbl = document.getElementById('tblMed');
    var lastRow= tbl.rows.length-1;
   	var a;

    for (a=1; a<=lastRow; a++)
		{
      var def = document.getElementById('sln'+ a);
      var ghi = document.getElementById('Mdesc'+ a);
	   var jkl = document.getElementById('Mqty'+ a);
	   var jkl1 = document.getElementById('Mqty'+ a).value;
       var abc = document.getElementById('Mbill'+ a);
       var gpexpdt2 = document.getElementById('tblMed').value;
      var str11  = document.getElementById("sdate").value; 
      var str12  = document.getElementById("edate").value;
	  var tranday = jkl1.substring(0,2);
      var tranmon = jkl1.substring(3,5);
      var tranyear = jkl1.substring(6,10);
	


	var trandate = new Date(tranyear,tranmon,tranday);
	 var tranday2 = str11.substring(0,2);
	  
          var tranmon2 = str11.substring(3,5);
         


	var tranyear2 = str11.substring(6,10);
	


	var trandate2 = new Date(tranyear2,tranmon2,tranday2);
	var tranday3 = str12.substring(0,2);
	  
          var tranmon3 = str12.substring(3,5);
         


	var tranyear3 = str12.substring(6,10);
	


	
if ((document.getElementById("AC").value == ""))
{
alert ( "Please enter Amount Claimed." );
document.form5.AC.focus();
return false;
}

else if((document.getElementById("Amb").value == ""))
{
alert ( "Please enter Relationship" );
document.form5.Amb.focus();
return false;
}

if ( document.form5.Treat.selectedIndex == "")
    {
        alert ( "Please select Treatment Type" );
		document.form5.Treat.focus();
        return false;
    }

else if((document.getElementById("C10").value == ""))
{
alert ( "Please enter Total " );
document.form5.C10.focus();
return false;
}

else if((document.getElementById("C11").value == ""))
{
alert ( "Please enter Place " );
document.form5.C11.focus();
return false;
}

else if((document.getElementById("start").value == ""))
{
alert ( "Please enter from date" );
document.form5.start.focus();
return false;
}

else if((document.getElementById("edate").value == ""))
{
alert ( "Please enter to date" );
document.form5.edate.focus();
return false;
}
    if (ghi.value.length == "")
	  {
        alert('Please enter Bill No');
        ghi.focus();

        return false;
      }
	  if (jkl.value.length == "")
	  {
        alert('Please enter Date');
	   jkl.focus();
        return false;
      }
	  var trandate3 = new Date(tranyear3,tranmon3,tranday3);
	if (tranmon > 12|| tranmon < 1)
		 {
			 alert('Invalid Month In Date Field .Enter as dd-mm-yy');
        	jkl.focus();
			 return false;
		 }
		 if (tranday > 31|| tranday < 1)
		 {
			 alert('Invalid Date In Date Field Enter as dd-mm-yy');
			 		jkl.focus();
			 return false;
		 }
		 if(trandate2.getTime() > trandate.getTime())
			{
	alert("Bill date should be less than From date");
	jkl.focus();
	return false;
			}
			if(trandate3.getTime() < trandate.getTime())
			{
	alert("Bill date should not  be greater than End date");
	jkl.focus();
	return false;
			}
	
     if (abc.value.length == "")
	  {
        alert('Please enter Amount');
	    abc.focus();
        return false;
      }
	  	
	 
var str3  = document.getElementById("AC").value;
var str4  = document.getElementById("Amb").value;

if(parseInt(str3) > parseInt(str4))
{
alert('Amount Claimed must be less than Amount Balance');
document.form5.AC.focus();
return false;
}	
var alertsay = ""; 
if (form5.Treat.value > 4)
{
alert("Sorry You Can Not This Employee Data In Database..........");
form5.Treat.focus();
return (false);
}
var checkOK = "0123456789";
var checkStr = abc.value;
var allValid = true;
var allNum = "";
for (e = 0;  e < checkStr.length;  e++)
{
ch = checkStr.charAt(e);
for (f = 0;  f < checkOK.length;  f++)
if (ch == checkOK.charAt(f))
break;

if (f == checkOK.length)
{
allValid = false;
break;
}
if (ch != ",")
allNum += ch;
}
if (!allValid)
{
alert("Invalid Data Please enter only digits'");
abc.focus();
return (false);
}
}
 return true;
}
var count =0;
function Check()
	{
if (!validate())
	return true;
	 addRow()
	}
function removeRow1()
{
var tbl = document.getElementById('tblMed');
var lastRow = tbl.rows.length;
if (lastRow > 1) tbl.deleteRow(lastRow - 1);
}
function deleteRow(node) {
if (rowNum > 1) {
var td = node.parentNode; 
while (td.tblMed.toLowerCase() != "tr") 
td = td.parentNode; 
td.parentNode.removeChild(td); 
rowNum = rowNum - 1;
document.form1.count.value = rowNum;
}
else { 
alert ("You cannot delete the last remaining row");
} 
}

</script>

<b><font color="#153E7E"border="1">Bill Details</b></legend><br>
<table id="tblMed" width="75%">
<tr>
<th>Sl.No.</th>
<th align="left">Bill No</th>
<th align="left" onClick="cal1xx.select(document.forms[0].edate,'anchor1xx','dd-MM-yy'); return false;" NAME="anchor1xx" ID="anchor1xx" onFocus="self.status='Select Treatment Start Date';return true; " onBlur="self.status='';return true;">Bill Date(DD-MON-YY)</th>
<th>Bill Amount( <span class="WebRupee">Rs.</span> )</th>

</tr>

</table>
<tr><br/>
&nbsp &nbsp <input name="button" type="button" value="Add  Bill" onClick="Check()"/>