function ValidatePhoneNumber(PhoneNumber)
{
    var re10digit=/^\d{10}$/
    if(PhoneNumber.value!="")
    {
    if (PhoneNumber.value.search(re10digit)==-1) 
    {
      alert("Please enter a 10-digit phone number (No dashes, punctuation or spaces)");
      PhoneNumber.value="";
      PhoneNumber.focus();
      return false; 
    }
    }
    else
    {
    return true;
    }
    
} 
function createOption(text, value)
 {    	
        var option = new Option();
   		option.text = text;
   		option.value = value;
   		return option;
 }
 function clearOptions(list)
 {
        for(var i = 0; i < list.options.length; i ++)
        list.options[i] = null;
 }
 function loadMonths()
   {
	var monthsList = document.getElementById('month');
    if (monthsList.options.length == 0)
        {
   			var options = getMonthOptions();
   			for(var i = 0; i < options.length; i++)
   				monthsList.options[i] = options[i];
   		} 
   }
   function getMonthOptions()
      {
   		if (monthOptions == null)
   		{
   			monthOptions = new Array();
   			var Quantity=document.getElementById("ctl00_ContentPlaceHolder2_txtItemQuantity");
   			for(var i = 1; i <= Quantity; i++)
   				monthOptions[monthOptions.length] = createOption(i, i);
   			
   		}
   		return monthOptions;
 }
 function CheckRemainingQuantity()
 {
 var Quantity
 var ddlItem1
    var ddlItem2
    var ddlItem3
    var ddlItem4
    var ddlItem5
    var ddlItem6
    var ddlItem7
    var ddlItem8
    var ddlItem9
    var ddlItem10
    var ddlItem11
    var ddlItem12
    if(document.getElementById("ctl00_ContentPlaceHolder2_txtItemQuantity")!=null && document.getElementById("ctl00_ContentPlaceHolder2_txtItemQuantity")!= 'undefined')
    {
    Quantity=document.getElementById("ctl00_ContentPlaceHolder2_txtItemQuantity").value;
    }
    else
    {
    Quantity='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem1")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem1")!= 'undefined')
    {
    ddlItem1=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem1").value;
    }
    else
    {
    ddlItem1='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem2")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem2")!= 'undefined')
    {
    ddlItem2=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem2").value;
    }
    else
    {
    ddlItem2='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem3")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem3")!= 'undefined')
    {
    ddlItem3=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem3").value;
    }
    else
    {
    ddlItem3='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem4")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem4")!= 'undefined')
    {
    ddlItem4=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem4").value;
    }
    else
    {
    ddlItem4='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem5")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem5")!= 'undefined')
    {
    ddlItem5=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem5").value;
    }
    else
    {
    ddlItem5='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem6")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem6")!= 'undefined')
    {
    ddlItem6=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem6").value;
    }
    else
    {
    ddlItem6='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem7")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem7")!= 'undefined')
    {
    ddlItem7=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem7").value;
    }
    else
    {
    ddlItem7='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem8")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem8")!= 'undefined')
    {
    ddlItem8=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem8").value;
    }
    else
    {
    ddlItem8='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem9")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem9")!= 'undefined')
    {
    ddlItem9=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem9").value;
    }
    else
    {
    ddlItem9='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem10")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem10")!= 'undefined')
    {
    ddlItem10=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem10").value;
    }
    else
    {
    ddlItem10='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem11")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem11")!= 'undefined')
    {
    ddlItem11=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem11").value;
    }
    else
    {
    ddlItem11='0';
    }
    if(document.getElementById("ctl00_ContentPlaceHolder2_ddlItem12")!=null && document.getElementById("ctl00_ContentPlaceHolder2_ddlItem12")!= 'undefined')
    {
    ddlItem12=document.getElementById("ctl00_ContentPlaceHolder2_ddlItem12").value;
    }
    else
    {
    ddlItem12='0';
    }
    //var lblRemainingQuantity=document.getElementById("ctl00_ContentPlaceHolder2_lblRemainingQuantity");
    var TotalQuantity;
    ddlItem1=new Number(ddlItem1);
    ddlItem2=new Number(ddlItem2);
    ddlItem3=new Number(ddlItem3);
    ddlItem4=new Number(ddlItem4);
    ddlItem5=new Number(ddlItem5);
    ddlItem6=new Number(ddlItem6);
    ddlItem7=new Number(ddlItem7);
    ddlItem8=new Number(ddlItem8);
    ddlItem9=new Number(ddlItem9);
    ddlItem10=new Number(ddlItem10);
    ddlItem11=new Number(ddlItem11);
    ddlItem12=new Number(ddlItem12);
    Quantity=new Number(Quantity);
    TotalQuantity = ddlItem1 + ddlItem2 + ddlItem3 + ddlItem4 + ddlItem5 + ddlItem6 + ddlItem7 + ddlItem8 + ddlItem9 + ddlItem10 + ddlItem11 + ddlItem12;
     TotalQuantity=new Number(TotalQuantity);
    var RemianingQuantity = Quantity - TotalQuantity;        
    var values= "(" + RemianingQuantity + " Left )";
    document.getElementById("lbl1").innerHTML=values;      
 }