// JavaScript Document
function validate(thisform)
{
	with (thisform)
	{
		if(fname.value=="Name")fname.value="";	
	if (emptyvalidation(fname,"Please enter Name")==false) 
		{
		fname.focus();
		return false;	
		}
		
	if(email.value=="Email")email.value="";	
	if (emptyvalidation(email,"Please enter Email Address")==false) 
		{
		email.focus();
		return false;	
		}		
		
		if(echeck(email.value)==false)
		{
			
			email.select();
			email.focus();
			return false;
		}
		
	if(phone.value=="Phone")phone.value="";	
	if (emptyvalidation(phone,"Please enter Phone Number")==false) 
		{
		phone.focus();
		return false;	
		}
		
			
	if(comments.value=="Comments")comments.value="";	
	if (emptyvalidation(comments,"Please enter Comments")==false) 
		{
		comments.focus();
		return false;	
		}
		
		
	}
	thisform.submit();
}	



function emptyvalidation(entered, alertbox)
{
	with (entered)
	{
		while (value.charAt(0) == ' ')
			value = value.substring(1);
		while (value.charAt(value.length - 1) == ' ')
			value = value.substring(0, value.length - 1);
		if (value==null || value=="")
		{
			if (alertbox!="") alert(alertbox);
			return false;
		}
		else return true;
	}
}

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					
	}