function agreeClicked(buttonId) {
	if (! buttonId) buttonId = 'tx_srfeuserregister_pi1_submit';
	agree = document.getElementById('tx-srfeuserregister-pi1-agree');
	submitbutton = document.getElementById(buttonId);
	submitbutton.disabled = !agree.checked; 
}

function reloadProductVersion() {
	var variants = "";
	var query = window.location.search.substring(1);
  var vars = query.split("&");
	var hreff = "index.php?";

	if (document.getElementById('productcolor'))
		variants += document.getElementById('productcolor').value;
	if (document.getElementById('productsize'))
		variants += '%3B'+document.getElementById('productsize').value;
	
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
		if (pair[0]=='tx_ttproducts_pi1[variants]') {
			var variantsOverwrite=1;
			pair[1]=variants;
		}
		hreff +='&'+pair[0]+"="+pair[1];
  }
	if (! variantsOverwrite) 
		hreff +='&tx_ttproducts_pi1[variants]='+variants;

//	alert(hreff);
	location.href = hreff;
}

function calculateMinPrice (url) {
	nums = document.getElementById('price_eur').innerHTML.split(",");
	if (nums[0]> 35)
		document.forms[0].action=url;
	else {
		alert('Minimálna cena nákupu je 35 eur');
		return false;
	}
}