function validateOrder() {
	var contactPerson=document.getElementById('contactPerson');
	var email=document.getElementById('email');
	var pages=document.getElementById('pages');
	var file=document.getElementById('file');
	if(contactPerson.value=='') {
		alert('Please fill in your name.');
		contactPerson.focus();
		return false;
	}
	if(email.value=='') {
		alert('Please fill in your email address.');
		email.focus();
		return false;
	}
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	if(reg.test(email.value)==false) {
		alert('Please fill in a valid email address.');
		return false;
	}
	if(pages.value=='') {
		alert('Please fill in number of pages.');
		pages.focus();
		return false;
	}
	if(file.value=='') {
		alert('Please upload your design files.');
		file.focus();
		return false;
	}
	var fileArr=file.value.split(".");
	if(fileArr[fileArr.length-1]!='psd' && fileArr[fileArr.length-1]!='png' && fileArr[fileArr.length-1]!='jpg' && fileArr[fileArr.length-1]!='zip' && fileArr[fileArr.length-1]!='rar') {
		alert('Please attach your designs as a psd, png, jpg or zip/rar file.');
		file.focus();
		return false;
	}
	return true;
}

function validatePages() {
	var pages=document.getElementById('pages');
	if(pages.value=='') pages.value='1';
	if(pages.value<1 || pages.value>1000) pages.value='1';
	var reg = /^\d+$/;
	if(reg.test(pages.value)==false) {
		pages.value='1';
	}
}