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 email address");
       return false;
    }

    if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
       alert("Invalid email address");
       return false;
    }

    if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
        alert("Invalid email address");
        return false;
    }

    if (str.indexOf(at,(lat+1))!=-1){
        alert("Invalid email address");
        return false;
    }

    if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
        alert("Invalid email address");
        return false;
    }

    if (str.indexOf(dot,(lat+2))==-1){
        alert("Invalid email address");
        return false;
    }
	
    if (str.indexOf(" ")!=-1){
        alert("Invalid email address");
        return false;
    }

   return true
}

function validateForm(){

    if (document.forms.quoteform.txtName.value == "") {
        alert("Please enter your full name.");
        document.forms.quoteform.txtName.focus(); 
        return false;
    }

    if (document.forms.quoteform.txtTelNo.value == "") {
        alert("Please enter your telephone number.");
        document.forms.quoteform.txtTelNo.focus();
        return false;
    }
    
	var emailID = document.forms.quoteform.txtEmail;
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your email address");
		emailID.focus();
		return false;
	}
	
	if (echeck(emailID.value)==false){
		emailID.value="";
		emailID.focus();
		return false;
	}
	
	return true;
	var form = document.getElementById('quoteform');
    form.post();
}