function toggleSubmit() {
	if(document.getElementById('accept_terms').checked) {
		document.getElementById('submit_but').disabled=false
	} else {
		document.getElementById('submit_but').disabled=true
	}
}

function openSizingChart() {
	window.open('http://90stshirts.com/sizing-chart.html' , 'Sizing Chart', 'menubar=1, resizable=1, width=500, height=500')	
}