var vemail="Email must be a valid Email address (like companyname@yahoo.com).";
var vzipcode=" must be a 6 or 5 (for US Country) digit Pin Code (eg: '600012' or '12345')";
var vempty=" should not be blank";
var whitespace = " \t\n\r";
var vnum=" should be a number";
var vRange = " should greater than ";

function checkNull(s,f){//To check Null values
	if (isWhitespace(s.value)) 
       return warnInvalid (s,f,vempty);
    else return true;
}

function checkCmb(s,f){//To check Null values


	if (s.value != "-1") 
	{
		
	    return true;   }
    else{ 
    s.focus();
   
     alert(f +vempty);
return false; }
    
}
function isWhitespace(s){ //To check whitespaces
    var i;
    if ((s == null) || (s.length == 0)) return true;
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (whitespace.indexOf(c) == -1) return false;
    }
    return true;
}

function warnInvalid(theField, s,errmsg){//Error message
    theField.focus();
	theField.select();
     alert(s +errmsg);
    return false;
}


function checkEmail (s,f,t){//To check Email  
	if (t == "r"){
		if (checkNull(s,f)){
			if (isEmail(s.value)){
				return true;   
				 }
			else{
					f="";
					return warnInvalid (s,f, vemail); 
			}
		}	
		else return false;
	}
	else{
		if (s.value != ""){
			if (isEmail(s.value)){
				return true;   
				 }
			else{
					f="";
					return warnInvalid (s,f, vemail); 
			}
		}	
		else return true;
	}		
}

function isEmail (s){ 
  if ((s == null) || (s.length == 0)) 
       if (isEmail.arguments.length == 1) return false;
       else return (isEmail.arguments[1] == true);
    if (isWhitespace(s)) return false;
    var i = 1;
    var sLength = s.length;
    while ((i < sLength) && (s.charAt(i) != "@")){ 
    i++
    }
    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;
    while ((i < sLength) && (s.charAt(i) != ".")){
     i++
    }
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}

function checkNumber(s,f,t){//To check Number
	if (t == "r"){
		if (checkNull(s,f)){
			if (!isInteger(s.value)){
					return warnInvalid(s,f,vnum);
					
			}	
			else return true;
			}
		else return false;	
	}
	else{
			if (s.value != ""){
			if (!isInteger(s.value)){
				return warnInvalid(s,f,vnum);
			}	
			else return true;
			}
		else return true;
	}	
}

function checkValidNumber(s,f,t){//To check Number
	
	if(s.value +0 < t )
	{
	return warnInvalid(s,f,vRange + (t-1) );
			}	
			else return true;
			
	
}

function isInteger (s){
    var i;
    if ((s == null) || (s.length == 0)) 
       if (isInteger.arguments.length == 1) return false;
       else return (isInteger.arguments[1] == true);
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (!isDigit(c)) return false;
    }
    return true;
}


function checkZipcode(s,f,t){//To check Zipcode
if (t == "r"){ 
	if (s.value.length == 5 || s.value.length == 6){

				return checkNumber(s,f,t);

	  } 
	else return warnInvalid (s,f,vzipcode);	   
}
else{
	if (s.value != ""){
		if (s.value.length == 5 || s.value.length == 6){

					return checkNumber(s,f,t);

		  } 
		else return warnInvalid (s,f,vzipcode);	   
	}
	else return true;		
}
}


function isDigit (c){ 
  return ((c >= "0") && (c <= "9"));
}

function Check()
{
var myForm = document.myform;
return (checkNull(myForm.txtname,"Name") && checkNull(myForm.txtcname,"Company Name") && checkNull(myForm.txtemail,"Email") && checkEmail(myForm.txtemail) && checkNull(myForm.txtph,"Phone"));
}

function check1()
{
var myForm = document.cfrm;
return (checkNull(myForm.txtname,"Name") && checkNull(myForm.txtcname,"Company Name") && checkEmail(myForm.txtemail,"Email","r") && checkNull(myForm.txtph,"Phone Number") && checkNull(myForm.txtwebsite,"Website") && checkNull(myForm.txtmsg,"Message"));
}