// JavaScript Document

//eliminates white spaces from a string
function trim(str)
{  
	while(str.charAt(0) == (" ") )
		str = str.substring(1);
  	while(str.charAt(str.length-1) == " " )
		str = str.substring(0,str.length-1);
  return str;
}

//validates an email address
function check_mail(str) 
{
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1)
	   return false
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr)
	   return false
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr)
		return false
	 if (str.indexOf(at,(lat+1))!=-1)
		return false
	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot)
		return false
	 if (str.indexOf(dot,(lat+2))==-1)
		return false
	 if (str.indexOf(" ")!=-1)
		return false
	 return true					
}

//validate a date
function check_date(input)
{
	ok = 1;
   	if(input.value != "")
	{
		var testString = input.value.split("/");
  		var dayfield=input.value.split("/")[0];
		var monthfield= input.value.split("/")[1];   
	 	var yearfield= input.value.split("/")[2];
		if(testString.length > 1)
		{
			if (monthfield.length <1 || monthfield.length >2 || dayfield.length < 1 || dayfield.length >2 || yearfield.length > 4  || yearfield.length < 2)
			{
			   ok = 2;
			   input.select();
			}
			else
			{ 
			 	//Detailed check for valid date ranges
				var dayobj = new Date(yearfield, monthfield-1, dayfield)
				if ((dayobj.getMonth()+1!=monthfield)||(dayobj.getDate()!=dayfield)||(dayobj.getYear()!=yearfield && dayobj.getFullYear() !=yearfield))
				{
				   ok = 2;
				   input.select();
				}
			}
		}
		else
		   ok = 2;
   }
	if (ok ==2) 
		validation=false;
	else
		validation = true;
	return validation;
}

//checks if file extention is valid as photo
function check_photoExtension(con)
{
    if(con.length >0)
    {
        var fileExtension = con.substring(con.lastIndexOf('.')+1,con.length);
        extensionValid =true;
        fileExtension = fileExtension.toUpperCase();
        if( fileExtension != "PNG" && fileExtension != "GIF" && fileExtension != "JPEG" && fileExtension != "JPG" )
            return false;	         				
   	}
	return true;
}

//checks if file extention is valid as file:doc,docx,xls,xlsx,ppt,pptx,txt,jpg,jpeg,pdf
function check_fileExtension(con)
{
    if(con.length >0)
    {
        var fileExtension = con.substring(con.lastIndexOf('.')+1,con.length);
        extensionValid =true;
        fileExtension = fileExtension.toUpperCase();
        if( fileExtension != "PDF" )
            return false;	         				
   	}
	return true;
}

//checks if URL is valid
function check_url(s) 
{
	var regexp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
	return regexp.test(s);
}

//checks if phone number is valid
function check_phoneNo(str)
{
	str=str.replace("/","");
	str=str.replace("+","");
	str=str.replace(".","");
	if (!IsNumeric(str))
		return false;
	else
		if(str=="")
			return false;
		else
			if(str.length<3)
				return false;
			else
				return true;
}

//checks if string is number
function IsNumeric(sText)
{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}

//submit form for admin adding
function submitAddForm()
{
	if(validate_form()==true)
		document.getElementById('add_form').submit();
}

function conf(strAlert)
{
	return confirm(strAlert);
}
//Create js date object from date,time string
function formatDateJS(strInput)
{
	var myDate = new Date;
	myDate = Date.UTC(strInput.split("/")[2]*1,strInput.split("/")[1]*1,strInput.split("/")[0]*1,0,0,0);
	return myDate;
}
function selParent(index)
{
	if(index!=0)
		document.getElementById('tr_photo').style.display = "none";
	else
	{
		if(!testIE())
			document.getElementById('tr_photo').style.display = "table-row";
		else
			document.getElementById('tr_photo').style.display = "block";
	}
}
function testIE()
{
	var browserName=navigator.appName; 
	var agt=navigator.userAgent.toLowerCase();
	if (browserName=="Microsoft Internet Explorer")
	  	return true;
	return false;
}