// JavaScript Document
function setZindex(div){
	document.getElementById(div).style.zIndex = 3;

}
function setImage(imageid,imagefile) {
	
	 document.getElementById(imageid).src = imagefile;
}
function checkheight() {

if ((document.getElementById('center_cont').offsetHeight > document.getElementById('right_cont').offsetHeight) && (document.getElementById('center_cont').offsetHeight > document.getElementById('left_cont').offsetHeight)) {
	
	var centerheight = document.getElementById('center_cont').offsetHeight;
	
} else if ((document.getElementById('left_cont').offsetHeight > document.getElementById('center_cont').offsetHeight) && (document.getElementById('left_cont').offsetHeight > document.getElementById('right_cont').offsetHeight) ) {
	
	
	
	var centerheight = document.getElementById('left_cont').offsetHeight;
} else {
	var centerheight = document.getElementById('right_cont').offsetHeight;
	
	
}
//var centerheight = document.getElementById('center_cont').offsetHeight;
var newheight = centerheight + 50;


if (centerheight > 20){

 document.getElementById('left_cont').style.height = centerheight + "px";
  document.getElementById('right_cont').style.height = centerheight + "px";
  document.getElementById('center_cont').style.height = centerheight + "px";

}

}

/**************************/


function randomimage() {
var randomimages=new Array()

	randomimages[0]="pics/creative_page.jpg"
	randomimages[1]="pics/fun_page.jpg"
	randomimages[2]="pics/8x55_page.jpg"
	randomimages[3]="pics/innovative_page.jpg"


var preload=new Array()

for (n=0;n<randomimages.length;n++)
{
	preload[n]=new Image()
	preload[n].src=randomimages[n]
}


document.getElementById("mainimage").style.backgroundImage = "url(" + randomimages[Math.floor(Math.random()*(randomimages.length))] + ")";
//document.write('<img name="defaultimage" src="'+randomimages[Math.floor(Math.random()*(randomimages.length))]+'">')


}

/***** form validation ******/

function checkForm() {

	var cafirstname, calastname, caemail;
	
		cafirstname    = document.joinus.fname;
		calastname  = document.joinus.lname;
		caemail = document.joinus.email;
		
		
	
	if(trim(cafirstname.value) == '')
	{
		alert('Please enter your first name');
		cafirstname.focus();
		return false;
	}
	else if(trim(calastname.value) == '')
	{
		alert('Please enter your last name');
		calastname.focus();
		return false;
	}
	else if(trim(caemail.value) == '')
	{
		alert('Please enter message subject');
		caemail.focus();
		return false;
	}
	 else if(!isEmail(trim(caemail.value)))
   {
      alert('Email address is not valid');
      caemail.focus();
      return false;
   }
	
	
	else
	{
		
		document.joinus.submit() 
		return true;
	}
}

/*
Strip whitespace from the beginning and end of a string
Input : a string
*/
function trim(str)
{
	return str.replace(/^\s+|\s+$/g,'');
}

/*
Check if a string is in valid email format. 
Returns true if valid, false otherwise.
*/
function isEmail(str)
{
	var regex = /^[-_.a-z0-9]+@(([-_a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
	return regex.test(str);
}

/************ 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;
}