// JavaScript Document
function sky()
{
var tname=document.frm1.txtname.value;
	if(tname== 0 || tname=="")
	{
	alert("Please Enter Your Name");
	document.frm1.txtname.focus();
	return false;
	}
var taddr=document.frm1.txtaddress.value;
	if(taddr==0 || taddr==" ")
	{
	alert("Please Enter Your Address");
	document.frm1.txtaddress.focus();
	return false;
	}
var tph=document.frm1.txtphone.value;
      if( tph.length == 0 || tph== " ")
        {  
                   alert("Please Mention Your Phone No");
                   document.frm1.txtphone.focus();
                   return false;
         } 		
var fmail=document.frm1.txtmail.value;
       if (fmail.length != 0 || fmail != " ")
       {
           if (echeck(document.frm1.txtmail.value)==false)
             {
	            fmail.value=""
	            document.frm1.txtmail.focus()
	             return false;
	          }
       }
var tremark=document.frm1.txtremark.value;
	if(tremark==0 || tremark==" ")
	{
	alert("Please Mention Your Remarks");
	document.frm1.txtremark.focus();
	return false;
	}	   
}
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;	
	}