function validate(form) {
    var errorText = 'Please enter the following detail(s): \n';
    var formError = false;
    
	var frm = document.getElementById(form);

	if(frm.date.value == "") {
     	errorText = errorText + "A valid date ,\n";
     	formError = true;
    }
    if(frm.name.value == "" || frm.name.value == "Name") {
     	errorText = errorText + "Your name ,\n";
     	formError = true;
    }
    
    if(frm.email.value == "" || frm.email.value == "Email") {
     	errorText = errorText + "Your email ,\n";
     	formError = true;
    }
	
	else if (emailcheck(frm.email.value)==false){
		errorText = errorText + "A valid email ,\n";
     	formError = true;
	}
   
    if(frm.message.value == "") {
     	errorText = errorText + "Your message ,\n";
     	formError = true;
    }
    
    if(formError) {
	
		var strLen = errorText.length;
		errorText = errorText.slice(0,strLen-2);
	    window.alert(errorText);
	    return false;
    };
   }
   


function emailcheck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }

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

 		 return true					
	}