function validate_form ( )
{
	var emailID=window.document.forms[0].txtemail
    valid = true;
    if ( window.document.forms[0].txtfname.value == "")    {
        alert ( "Please enter your 'name'" );
		window.document.forms[0].txtfname.focus();
        valid = false;
		}
	else if ( (!echeck(window.document.forms[0].txtemail.value)) || (window.document.forms[0].txtemail.value=="") ){
		alert("Please Enter a Valid Email Address");
		window.document.forms[0].txtemail.focus();
		valid = false;
		}
	else if ( ( window.document.forms[0].txtlocation[0].checked == false )
    && ( window.document.forms[0].txtlocation[1].checked == false ) )
    {
        alert( "Please enter your location" );
        valid = false;
    }
	else if( window.document.forms[0].txtmsg.value == "")    {
        alert ( "Please enter your message" );
		window.document.forms[0].txtmsg.focus();
        valid = false;
		}
		
return valid;
}

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){
		   return false
		}
		else if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   window.document.forms[0].txtemail.focus();
		   return false
		}
		else if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		 	window.document.forms[0].txtemail.focus();
		    return false
		}

		else if (str.indexOf(at,(lat+1))!=-1){
		 	window.document.forms[0].txtemail.focus();
		    return false
		 }

		else if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		 	window.document.forms[0].txtemail.focus();
		    return false
		 }

		 else if (str.indexOf(dot,(lat+2))==-1){
		 	window.document.forms[0].txtemail.focus();
		    return false
		 }
		
		 else if (str.indexOf(" ")!=-1){
		 	window.document.forms[0].txtemail.focus();
		    return false
		 }

 		 return true					
	}
	
function ResetForm() {
		var form = document.forms[0];
		document.forms[0].txtfname.value = "";
		document.forms[0].txtlname.value = "";
		document.forms[0].txtemail.value = "";
		document.forms[0].msg.value="";
		}