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 validation()
{
   var emailID=document.getElementById('e_email');
    if(document.contact.e_name.value=="")
	{
	   alert("Please Enter Your Name");
	   document.contact.e_name.value="";
	   document.contact.e_name.focus();
	   return false;
	}
	if(document.contact.e_email.value=="")
	{
	   alert("Please Enter Your email-id");
	   document.contact.e_email.value="";
	   document.contact.e_email.focus();
	   return false;
	}
	
	if(echeck(emailID.value)==false)
    	{
			emailID.value=""
			emailID.focus()
		 return false;
     	}
    if(document.contact.e_mobile.value=="")
	{
	   alert("Please Enter Your Mobile No");
	   document.contact.e_mobile.value="";
	   document.contact.e_mobile.focus();
	   return false;
	}
    if(document.contact.message.value=="")
	{
	   alert("Please Enter Your Message");
	   document.contact.message.value="";
	   document.contact.message.focus();
	   return false;
	}
 return true;
}