function validate_required(field,alerttxt){
	with (field){
		if (value==null||value=="")
		  {alert(alerttxt);return false;}
		else {return true;}
	}
}

function validate_email(field,alerttxt){
	with (field){
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2){alert(alerttxt);return false;}
		else {return true;}
	}
}

// Phone validation
/* DHTML phone number validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/) */
// 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);
}

function validate_phone(){
	var Phone=document.requestquote.phone;
	
	if ((Phone.value==null)||(Phone.value=="")){
		alert("Please enter a phone number");
		Phone.focus();
		return false;
	}
	if (checkInternationalPhone(Phone.value)==false){
		alert("Please enter a valid phone number");
		Phone.value="";
		Phone.focus();
		return false;
	}
	return true;
 }
 // End Phone validation


function validate_checkbox(){
	var ckbxProj_arr=document.getElementsByName('project[]'); 
		
	var ckbxProj_arr_ln=ckbxProj_arr.length; 
	for(var i=0;i<ckbxProj_arr_ln;i++){ 
		if(ckbxProj_arr[i].checked)return true; 
	} 
	return false; 
}

function validate_form(thisform){
	with (thisform){
		
		if (validate_required(name,"Please enter your name")==false)
		  {name.focus();return false;}
		
		else if (validate_email(email,"Please enter a valid e-mail address")==false)
		  {email.focus();return false;}
		
		else if (validate_phone()==false)
		  {phone.focus();return false;}
		
		else if (validate_checkbox()==false)
		  {alert ("Please select at least one checkbox");company.focus();return false;}
		
	}
}