window.onload = function () {
    var header = document.getElementById('header');
    var pictures = new Array('images/header1.png','images/header2.png','images/header3.png	');
    var numPics = pictures.length;
    if (document.images) {
        var chosenPic = Math.floor((Math.random() * numPics));
        header.style.background = 'url(' + pictures[chosenPic] + ')';
    }
}

function validate(){
			  var yourname = document.getElementById("name");
			  if (yourname.value.trim() ==""){
			   alert('Please enter your name');
			 	document.getElementById("name").focus();
				return false;
			  }
			 
			 var email = document.getElementById("email");
				var error = "Not a valid email address";
			  	var address = email.value;
			  	var length = email.length;
				var invalidchar = new Array("`","~","!", "#","$","%","^","&","*","(",")","-","=","+","[","]","{","}",";",":","'", ",", "?");
				
				var tld = address.indexOf("@");
				 if (address.trim() ==""){
								alert('Please enter an email address');
								return false;
								}
								
			  		for(i=0; i<invalidchar.length; i++ ){
										if (address.indexOf(invalidchar[i]) != -1){
										alert(error);
										return false;
										}								
									}
					if (address.indexOf("@") == -1 || address.indexOf("@") == 0){
								 		 alert(error);
										 return false;
			  		}
			  			else if (address.indexOf(".") == -1 || address.indexOf(".") == tld + 1 || address.indexOf(".") == 0){
			  			 alert(error);
						 return false;
			  			}
						var comment = document.getElementById("comments");
						if (comment.value.trim() == ""){
						alert('Please enter a message');
						return false;
						}
return true;
}

gSlideshowInterval =3 ;
gNumberOfImages = 14;

 

gImages = new Array(gNumberOfImages);

 

                        gImages[0] = "images/Sehraya Hookah 1.jpg";
						gImages[1] = "images/Sehraya Hookah 2.jpg";
                        gImages[2] = "images/Sehraya Hookah 3.jpg";
                        gImages[3] = "images/Sehraya Hookah 4.jpg";
                        gImages[4] = "images/Sehraya Hookah 5.jpg";
						gImages[5] = "images/Sehraya Hookah 6.jpg";
						gImages[6] = "images/Sehraya Hookah 7.jpg";
						gImages[7] = "images/Sehraya Hookah 8.jpg";
						gImages[8] = "images/Sehraya Hookah 9.jpg";
						gImages[9] = "images/Sehraya Hookah 10.jpg";
						gImages[10] = "images/Sehraya Hookah 11.jpg";
						gImages[11] = "images/Sehraya Hookah 12.jpg";
						gImages[12] = "images/Sehraya Hookah 13.jpg";
						gImages[13] = "images/Sehraya Hookah 14.jpg";
						

function canManipulateImages() {
            if (document.images)
                        return true;
            else
                        return false;
}

function loadSlide(imageURL) {
            if (gImageCapableBrowser) {
                        document.slide.src = imageURL;
                        return false;
            }
            else {
                        return true;
            }
}

function nextSlide() {
            gCurrentImage = (gCurrentImage + 1) % gNumberOfImages;
            loadSlide(gImages[gCurrentImage]);
}

gImageCapableBrowser = canManipulateImages();

gCurrentImage = 0;

setInterval("nextSlide()",gSlideshowInterval * 1000);