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 validate_function()
{
	if(document.getElementById("name").value=='')
	{
		alert('Please Fill Name');
		document.getElementById("name").focus();
		return false;
		}
	
	if(document.getElementById("address").value=='')
	{
		alert('Please Fill Address');
		document.getElementById("address").focus();
		return false;
		}
		
		// *************************************** Start code for email address ***********************************************
		var emailID=document.getElementById("emailid");      
		if((emailID.value==null)||(emailID.value=="")){
		
		alert("Please Enter your Email ID");
		document.getElementById("emailid").focus();
		return false;
	    }
	    else if(echeck(emailID.value)==false){
		emailID.value="";
		document.getElementById("emailid").focus();
		return false;
	}	
	// ************************************** End Code For email Address *************************************************		
	
	if(document.getElementById("phone").value=='')
	{
		alert('Please Fill Phone');
		document.getElementById("phone").focus();
		return false;
		}
		
		if(document.getElementById("phone1").value=='')
	{
		alert('Please Fill Phone Next field');
		document.getElementById("phone1").focus();
		return false;
		}
		
		if(document.getElementById("phone2").value=='')
	{
		alert('Please Fill Phone Last field');
		document.getElementById("phone2").focus();
		return false;
		}
		
		if(document.getElementById("city").value=='')
	{
		alert('Please Fill City');
		document.getElementById("city").focus();
		return false;
		}
		
	
	var str=document.getElementById("chk_name").value;
	//alert(str);
	if(document.getElementById("captcha_name").value=='')
	{
		alert("Please enter captcha");
		document.getElementById("captcha_name").focus();
		return false;
	}else if(str!=document.getElementById("captcha_name").value)
	{
			alert('Please enter right captcha code.');
			document.getElementById("captcha_name").focus();
			return false;
	}
}