function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		prototype_03_over = newImage("images/prototype_03-over.png");
		prototype_03_down = newImage("images/prototype_03-down.png");
		prototype_04_over = newImage("images/prototype_04-over.png");
		prototype_04_down = newImage("images/prototype_04-down.png");
		prototype_05_over = newImage("images/prototype_05-over.png");
		prototype_05_down = newImage("images/prototype_05-down.png");
		prototype_06_over = newImage("images/prototype_06-over.png");
		prototype_06_down = newImage("images/prototype_06-down.png");
		prototype_07_over = newImage("images/prototype_07-over.png");
		prototype_07_down = newImage("images/prototype_07-down.png");
		prototype_08_over = newImage("images/prototype_08-over.png");
		prototype_08_down = newImage("images/prototype_08-down.png");
		preloadFlag = true;
	}
}

function go(){	

	var name = document.forms[0].elements['name'].value;
	if(name == ''){
		alert('Your Name is required');
		document.forms[0].elements['name'].focus = true;
		return false;
	}
	var company = document.forms[0].elements['company'].value;
	if(company == ''){
		alert('Company is required');
		document.forms[0].elements['company'].focus = true;
		return false;
	}
	var file = document.forms[0].elements['f2'].value;
	if(file == ''){
		alert('A File is required');
		document.forms[0].elements['f2'].focus = true;
		return false;
	}
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	var mail = document.forms[0].elements['email'].value;
	if(mail == ''){
		alert('Email Address is required');
		document.forms[0].elements['email'].focus = true;
		return false;
	}
	if(reg.test(mail) == false) {
		alert('Invalid Email Address');
		return false;
	}

	document.getElementById("prg").style.display='block';
	document.getElementById("uploadForm").style.opacity='0.2';
	document.myform.submit();
  	document.getElementById("progress_img").style.display='block';
}