function tcsWin(){
	var popup = window.open("http://www.angebote.opodo.de/reisen/teilnahmebedingungen-afrika/","tcs","width=800,height=600,scrollbars=1");
}


/**
 * validates email input of user
 */
function check_and_go() {
	var email_regex = /^([_a-zA-Z0-9-]+)(\.[_a-zA-Z0-9-]+)*@([a-zA-Z0-9-]+\.)+([a-zA-Z]{2,4})$/;

	if (document.emailform.email.value=="") {
		call_error("Bitte tragen Sie Ihre E-Mail Adresse ein.");
		return false;
	} else if ((email_regex.test(document.emailform.email.value))==false) {
		call_error("Die E-Mail Adresse hat kein gültiges Format.");	
		return false;
	
	
	/* } else if (document.getElementById('tac').checked == false) {
		call_error("Bitte bestätigen Sie, dass Sie die Teilnahmebedingungen gelesen haben!");
		return false; */
	
	} else {  
		document.getElementById("errormsg").style.display = "none";
		document.getElementById("email").style.border = "solid green 1px";		
		//	document.getElementById("tac").style.border = "solid green 1px";	
		document.getElementById("sicherheitscode").style.border = "solid green 1px";		
		document.emailform.submit();
	}
}

/**
 * clean up messages when user input changes
 */
function clear_error() {
	if (document.getElementById("errormsg").style.display != "none") {
		document.getElementById("errormsg").style.display = "none";
		document.getElementById("email").style.border = "solid gray 1px";
		//document.getElementById("tac").style.border = "solid green 1px";
		document.getElementById("sicherheitscode").style.border = "solid gray 1px";				
	}
}

function call_error(message) {
	document.getElementById("errormsg").innerHTML = message; 
	document.getElementById("errormsg").style.display = "block";
	document.getElementById("email").style.border = "solid red 1px";	
	//document.getElementById("tac").style.border = "solid red 1px";		
	document.getElementById("sicherheitscode").style.border = "solid red 1px";	
}