function echeck(str) {
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
		//alert("Invalid E-mail ID")
		return false
	}
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		//alert("Invalid E-mail ID")
		return false
	}
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		 //alert("Invalid E-mail ID")
		 return false
	}
	 if (str.indexOf(at,(lat+1))!=-1){
		 //alert("Invalid E-mail ID")
		 return false
	 }
	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		 //alert("Invalid E-mail ID")
		 return false
	 }
	 if (str.indexOf(dot,(lat+2))==-1){
		 //alert("Invalid E-mail ID")
		 return false
	 }
	 if (str.indexOf(" ")!=-1){
		 //alert("Invalid E-mail ID")
		 return false
	 }
	 return true					
}


function check(formulier)
{
	
	if (formulier.naam.value=="") {
		document.getElementById("naam").style.borderColor = "#D14600";
		document.getElementById("naam").style.borderWidth = "2px";
		formulier.naam.focus();
		return false;
   } else {
		document.getElementById("naam").style.borderColor = "#81a0bf";
		document.getElementById("naam").style.borderWidth = "1px";
	}
	
	
	var emailID=formulier.email
	if ((emailID.value==null)||(emailID.value=="")){
		document.getElementById("email").style.borderColor = "#D14600";
		document.getElementById("email").style.borderWidth = "2px";
		emailID.focus();
		return false;
	} else {
		document.getElementById("email").style.borderColor = "#81a0bf";
		document.getElementById("email").style.borderWidth = "1px";
	}
	if (echeck(emailID.value)==false){
		alert("Vul een geldig e-mail adres in.");
		emailID.focus();
		return false;
	} else {
		document.getElementById("email").style.borderColor = "#81a0bf";
		document.getElementById("email").style.borderWidth = "1px";
	}

	
	
	if (formulier.telefoon.value=="") {
		document.getElementById("telefoon").style.borderColor = "#D14600";
		document.getElementById("telefoon").style.borderWidth = "2px";
		formulier.telefoon.focus();
		return false;
   } else {
		document.getElementById("telefoon").style.borderColor = "#81a0bf";
		document.getElementById("telefoon").style.borderWidth = "1px";
	}
	
}