//for phone validation
var digits = "0123456789";
var phoneNumberDelimiters = "()- ";
var validWorldPhoneChars = phoneNumberDelimiters + "+";
var minDigitsInIPhoneNumber = 10;

function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    return true;
}

function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

var emailFilter=/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;

function checkFormco()
{
   var ch_name, ch_contact, ch_email;      
   with(window.document.cform)
   {
      ch_name = pname;
	  ch_contact = contact_no;
	  ch_email = email;

	  
   }
		var at="@"
		var dot="."
		var str=ch_email.value
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)		
		var atpos=str.indexOf(at)
		var dotpos=str.indexOf(dot)
		var dname= str.substring(atpos+1, dotpos)
		
   if(trim(ch_name.value) == '')
   {
      alert('Please Enter Your Name');
      ch_name.focus();
      return false;	 
   }   
      
    
   else if(trim(ch_email.value) == '')
   {
      alert('Please Enter Your Email');
      ch_email.focus();
      return false;	  
   }
   
	else if (!(emailFilter.test(ch_email.value))) { 
       alert("Please Enter a Valid Email Address.");
	   ch_email.focus()
	   return false
	}
	
	else if(trim(ch_contact.value) == '')
   {
      alert('Please Enter Your Contact Number');
      ch_contact.focus();
      return false;	  
   }  
   else if (checkInternationalPhone(ch_contact.value)==false){
		alert("Please Enter a Valid Phone Number")
		ch_contact.focus()
		return false
	}
     
   else
   {      
	 cform.submit();
      return true;	  
   }
}

function trim(str)
{
   return str.replace(/^\s+|\s+$/g,'');
}