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 contact_form()
{
	var frm1=document.form146;
	var flag=0;
	var msg="";
	var flag=-1;
	//var bb="save";
	if(frm1.name.value=="")
	{
	msg="Please enter your full name";
	flag=1;
	frm1.name.focus();
	}
	if(frm1.phone.value=="")
	{
	msg+="\nPlease enter your phone number";
	flag=1;
	}
	if(frm1.email.value=="")
	{
	msg+="\nPlease enter your email address";
	flag=1;
	}
	if(echeck(frm1.email.value)==false){
    msg+="\nPlease enter correct email address";
	flag=1;
	}
	if(frm1.mess.value=="")
	{
	msg+="\nPlease enter your message";
	flag=1;
	}
	if(flag!=1)
	{
		
				frm1.action="sub.php?case=continue";
				frm1.submit();
			
	}
	else
	{
		
		alert(msg);
		return false;
	}
}