// JavaScript Document  

	function check()
	{
		var Email1	 	= document.form1.email1.value;
		var Email2	 	= document.form1.email2.value;
		var mail = document.form1.mail.value;
		
		if(Trim(Email1) == 0)
		{
			alert("Please enter your email id");
			document.form1.email1.select(); 
			document.form1.email1.focus();
			return false;
		}
		else
		{
			var email3 = document.form1.email1.value;
			var e3,e4;
			var err1 = new Array(0,0);
			e3 = email3.indexOf("@");
			e4 = email3.lastIndexOf("@");
			
			if(e3 != -1 && e3 == e4)
			{
				var a = email3.indexOf(".",e3);
				if((a-e3) < 2)
				err1[0] = 1;
			}
			else{	err1[0] = 1;		}
			
			if(err1[0] == 1)
			{
				alert("The email id you have entered is in an invalid format. Please check and re-enter again");
				document.form1.email1.select();	
				document.form1.email1.focus();
				return false;			
			}
		}		
	
		if(Trim(Email2) == 0)
		{
			alert("Please enter your friend email id");
			document.form1.email2.select(); 
			document.form1.email2.focus();
			return false;
		}
		else
		{
			var email4 = document.form1.email2.value;
			var e3,e4;
			var err1 = new Array(0,0);
			e3 = email4.indexOf("@");
			e4 = email4.lastIndexOf("@");
			
			if(e3 != -1 && e3 == e4)
			{
				var a = email4.indexOf(".",e3);
				if((a-e3) < 2)
				err1[0] = 1;
			}
			else{	err1[0] = 1;		}
			
			if(err1[0] == 1)
			{
				alert("The email id you have entered is in an invalid format. Please check and re-enter again");
				document.form1.email2.select();	
				document.form1.email2.focus();
				return false;			
			}
		}		
	}
	
	// Trims all spaces to the left of a specific string
	function LTrim(str)
	{
		var whitespace = new String(" \t\n\r "); 
		var s = new String(str);
		if (whitespace.indexOf(s.charAt(0)) != -1) 
		{
			var j=0, i = s.length;
			while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
				j++;
			s = s.substring(j, i);
		}
		return s;
	}
	// Trims all spaces to the right of a specific string
	function RTrim(str)
	{
		var whitespace = new String(" \t\n\r "); 
		var s = new String(str);
		if (whitespace.indexOf(s.charAt(s.length-1)) != -1) 
		{
			var i = s.length - 1;       // Get length of string
			while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
				i--;
			s = s.substring(0, i+1);
		}
		return s;
	}
	
	// Trims all spaces to the left and right of a specific string by calling RTim and LTrim
	function Trim(str)
	{
		return RTrim(LTrim(str));
	}