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;
		}

		else if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr-1){
		    alert("Invalid E-mail ID") ;
		    return false;
		}                

		 else if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID");
		    return false;
		 }

		 else if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID");
		    return false ;
		 }

		 else if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID");
		    return false ;
		 }
		
		 else if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID");
		    return false;
		 }

 		 return true;					
}
function checkDetails()
{

with(window.document.requestquote)
	{   
	if(email.value == '')
    {
    //tb_show("<img src='/images/warning-icon.gif' alt='' vspace='5' /><br />Please enter your mail id", "popup_alert.php?height=200&width=280", '');
    alert('An error has occurred. Please ensure that you fill in all fields correctly');email.focus();
    return false;
    }
  
  if(captcha_code.value == '')
    {
    //tb_show("<img src='/images/warning-icon.gif' alt='' vspace='5' /><br />Please enter code", "popup_alert.php?height=200&width=280", '');
    alert('An error has occurred. Please ensure that you fill in all fields correctly');captcha_code.focus();
    return false;
    }
	}	
}