// JavaScript Document

function getHTTPObject()

{	

	var xmlHttp;

	try

	{

		// Firefox, Opera 8.0+, Safari

		xmlHttp=new XMLHttpRequest();

	}

	catch (e)

	{

		// Internet Explorer

		try

		{

			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");		

		}

		catch (e)

		{

			try

			{

				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");

			}

			catch (e)

			{

				alert("Your browser does not support AJAX!");

				return false;

			}

		}

	}

	return xmlHttp;

}



function draw_query_string(form)

{



	var args = new Array();

	var ele = form.elements;

	for (var i=0; i<ele.length; i++) 

	{		

	  if (!ele[i].name) 

	  continue;      

	  if (ele[i].tagname = 'input' && (ele[i].type == 'checkbox' || ele[i].type == 'radio') && !ele[i].checked) 

	  continue;

							

		  if (ele[i].tagname = 'select' && ele[i].multiple) 

		  {

			  for (j=0; j<ele[i].options.length; j++) 

			  {

				  if (ele[i].options[j].selected)

				  args.push(ele[i].name + "=" + encodeURIComponent(ele[i].options[j].value));

			  }

		  } 

		  else 

		  {

			  args.push(ele[i].name + "=" + encodeURIComponent(ele[i].value));

		  }

	  }			        

	postVars = args.join("&");

   //alert(postVars);

   return postVars;    

}





function check_wordlength(val)

{

	var val_length = val.value.length;

	

	//valPer = Math.round(((val_length/500) * 100)*Math.pow(10,2))/Math.pow(10,2);

	

	valPer = 500 - val_length;

	var spnval = "";	

	if(valPer < 0)

	{

		spnval = '<font style="color:#CC0000;"><b>0</b></font> character left.';

	}	

	else if(valPer == 1)

	{

		spnval = '<font style="color:#8c8c8c;"><b>'+valPer+'</b></font>  character left.';

	}

	else

	{

		spnval = '<font style="color:#8c8c8c;"><b>'+valPer+'</b></font>  characters left.';

	}

	//document.getElementById("msgcompleteSpan").innerHTML = spnval;

}



function check_email(email_val)

{

	var reg2 = /^[a-zA-Z0-9_\.\-]+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/;

	return reg2.test(email_val);

}



//this function will compare two dates

			

function compare_date(date1,date2)

{

	var val1 = date1.split("/");

	var val2 = date2.split("/");

	var d1 = new Date();

	d1.setFullYear(val1[2],(val1[0]-1),val1[1]);

	

	var d2 = new Date();

	d2.setFullYear(val2[2],(val2[0]-1),val2[1]);

	

	if(d1 > d2)

	{

		return false;

	}

	else

	{

		return true;

	}

}



function validate_date(date_val)

{

	var val = date_val.split("/");

	var msg = '';

	if((val[0] == 4 || val[0]==6 || val[0]==9 || val[0]==11) && val[1] > 30)

	{

		msg ="invalid number of days in "+val[0]+" month,not greater than 30";

	}

	else if(val[0] == 2 && val[1] > check_leapYear(val[2]))

	{

		msg ="invalid number of days in "+val[0]+" month,not greater than "+check_leapYear(val[2]);

	}

	

	return msg;

}



//this function will comapre two times in HH:MM format



function compare_time(time1,time2)

{

	var val1 = time1.split(":");

	var val2 = time2.split(":");

	if(val1[0] > val2[0])

	{

		return false;

	}

	else if((val1[0] == val2[0])&& (val1[1] > val2[1]))

	{

		return false;

	}

	else

	{

		return true;

	}

}



//this function will check given year is leap year



function check_leapYear(datea)

{

	datea = parseInt(datea);

	if(datea%4 == 0)

	{

		if(datea%100 != 0)

		{

			return 29;

		}

		else

		{

			if(datea%400 == 0)

				return 29;

			else

				return 28;

		}

	}

	return 28;

}



function hasWhiteSpace(s)

{

	var msg = "";

	reWhiteSpace = new RegExp(/^\s+$/);

	if(reWhiteSpace.test(s))

	{

		return true;

	}

	else

	{

		return false;

	}

}

//Note, num is the number you want rounded and dec is the number of decimal places you want rounded to.

function roundNumber(num, dec) {

	var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);

	return result;

}



function validate_inviteForm(form)

{

	if(form.invited_name.value=="" || hasWhiteSpace(form.invited_name.value))

	{

		alert("Please enter your name");

		form.invited_name.focus();

		return false;

	}	

	

	if(form.friends_email.value=="" || hasWhiteSpace(form.friends_email.value))

	{

		alert("Please enter emails to be sent");

		form.friends_email.focus();

		return false;

	}	

	if(form.message.value.length > 500)

	{

		alert("Message can not contain more than 500 characters");

		form.message.focus();

		return false;

	}

}