function val_chk1(theForm)



	{



		



		var reason="";



		



		



		reason+=validateEmpty(theForm.form1);

		reason+=validatePhone(theForm.phone);

		



		reason+=validateEmail1(theForm.email);



		



		//alert(reason);



		if (reason != "")



	 	 {



    		alert("Some fields need correction:\n" + reason);



    		return false;



 	 	 }



		 else



		 {



	  		return true;



		}



		



		



	}







function validateEmpty(fld)



{



	



	var error = "";



	



	if(document.form1.realname.value=="")



	{



		error="Please enter  name.\n";



		document.form1.realname.style.background='Yellow';



	}



	



	else if(document.form1.realname.value!="")



	{



		



		document.form1.realname.style.background='#ffffff';



	}



	if(document.form1.details.value=="")



	{



	    error=error+"Please enter message.\n";



		document.form1.details.style.background='Yellow';



		



	}



	else if(document.form1.details.value!="")



	{



	  document.form1.details.style.background='#ffffff';



	}



	



	



	



 



	



    return error; 



}











function validateEmail1(fld)



{



	



	var error="";



	var tfld=fld.value.replace(/^\s+|\s+$/,'');



	var emailFilter=/^[^@]+@[^@.]+\.[^@]*\w\w$/;



	var illegalChars=/[\(\)\<\>\,\;\:\\\"\[\]]/ ;



	



	if(fld.value=="")



	{



		fld.style.background='Yellow';



		error="Please enter an email address.\n";



	}



	else if(!emailFilter.test(tfld))



	{



		fld.style.background='Yellow';



		error="Please enter valid email address.\n";



	}



	else if(fld.value.match(illegalChars))



	{



		fld.style.backgound='Yellow';



		error="Email address contain illegal chararacters.\n"



	}



	else



	{



		fld.style.background='#ffffff';



	}



	return error;



}



function validatePhone(fld)



{







// Declaring required variables



var digits = "0123456789";



// non-digit characters which are allowed in phone numbers



var phoneNumberDelimiters = "()- ";



// characters which are allowed in international phone numbers



// (a leading + is OK)



var validWorldPhoneChars = phoneNumberDelimiters + "+";



// Minimum no of digits in an international phone no.



var minDigitsInIPhoneNumber = 10;







function isInteger(s)



{   var i;



    for (i = 0; i < s.length; i++)



    {   



        // Check that current character is number.



        var c = s.charAt(i);



        if (((c < "0") || (c > "9"))) return false;



    }



    // All characters are numbers.



    return true;



}



function trim(s)



{   var i;



    var returnString = "";



    // Search through string's characters one by one.



    // If character is not a whitespace, append to returnString.



    for (i = 0; i < s.length; i++)



    {   



        // Check that current character isn't whitespace.



        var c = s.charAt(i);



        if (c != " ") returnString += c;



    }



    return returnString;



}



function stripCharsInBag(s, bag)



{   var i;



    var returnString = "";



    // Search through string's characters one by one.



    // If character is not in bag, append to returnString.



    for (i = 0; i < s.length; i++)



    {   



        // Check that current character isn't whitespace.



        var c = s.charAt(i);



        if (bag.indexOf(c) == -1) returnString += c;



    }



    return returnString;



}







function checkInternationalPhone(strPhone){



var bracket=3



strPhone=trim(strPhone)



if(strPhone.indexOf("+")>1) return false



if(strPhone.indexOf("-")!=-1)bracket=bracket+1



if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket)return false



var brchr=strPhone.indexOf("(")



if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")")return false



if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false



s=stripCharsInBag(strPhone,validWorldPhoneChars);



return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);



}



	



   if (fld.value == "") {



   		



			error = "Please enter a phone number.\n"



			fld.style.background = 'Yellow';



		



		



        



    }else if (checkInternationalPhone(fld.value)==false){



		error = "Please enter valid phone number.\n"



		fld.style.background = 'Yellow';



		



	}



	else



	{



		fld.style.background = '#ffffff';



		error ="";



	}



	



    return error;



}